import { Context } from './context';
/**
 * Cookie options of the HttpResponse.setCookie method.
 *
 * The value of maxAge is in seconds.
 *
 * @export
 * @interface CookieOptions
 */
export interface CookieOptions {
    domain?: string;
    expires?: Date;
    httpOnly?: boolean;
    maxAge?: number;
    path?: string;
    secure?: boolean;
    sameSite?: 'strict' | 'lax' | 'none';
    signed?: boolean;
}
/**
 * Represent an HTTP response. This class must be extended.
 * Instances of HttpResponse are returned in hooks and controller
 * methods.
 *
 * @export
 * @abstract
 * @class HttpResponse
 */
export declare abstract class HttpResponse<T = any> {
    /**
     * Property used internally by isHttpResponse.
     *
     * @memberof HttpResponse
     */
    readonly isHttpResponse = true;
    /**
     * Status code of the response.
     *
     * @abstract
     * @type {number}
     * @memberof HttpResponse
     */
    abstract readonly statusCode: number;
    /**
     * Status message of the response. It must follow the HTTP conventions
     * and be consistent with the statusCode property.
     *
     * @abstract
     * @type {string}
     * @memberof HttpResponse
     */
    abstract readonly statusMessage: string;
    /**
     * Specify if the body property is a stream.
     *
     * @type {boolean}
     * @memberof HttpResponse
     */
    readonly stream: boolean;
    body: T;
    private cookies;
    private headers;
    /**
     * Create an instance of HttpResponse.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponse
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
    /**
     * Add or replace a header in the response.
     *
     * @param {string} name - The header name.
     * @param {string} value - The value name.
     * @returns {this}
     * @memberof HttpResponse
     */
    setHeader(name: string, value: string): this;
    /**
     * Read the value of a header added with setHeader.
     *
     * @param {string} name - The header name.
     * @returns {(string|undefined)} The header value or undefined if it
     * does not exist.
     * @memberof HttpResponse
     */
    getHeader(name: string): string | undefined;
    /**
     * Read all the headers added with setHeader.
     *
     * @returns {{ [key: string]: string }} - The headers.
     * @memberof HttpResponse
     */
    getHeaders(): {
        [key: string]: string;
    };
    /**
     * Add or replace a cookie in the response.
     *
     * @param {string} name - The cookie name.
     * @param {string} value - The cookie value.
     * @param {CookieOptions} [options={}] - The cookie directives if any.
     * @returns {this}
     * @memberof HttpResponse
     */
    setCookie(name: string, value: string, options?: CookieOptions): this;
    /**
     * Read the value and directives of a cookie added with setCookie.
     *
     * @param {string} name - The cookie name.
     * @returns {({ value: string|undefined, options: CookieOptions })} The cookie value and directives
     * or undefined and an empty object if the cookie does not exist.
     * @memberof HttpResponse
     */
    getCookie(name: string): {
        value: string | undefined;
        options: CookieOptions;
    };
    /**
     * Read all the cookies added with setCookie.
     *
     * @returns {({ [key: string]: { value: string|undefined, options: CookieOptions } })}
     * The name, value and directives of the cookies.
     * @memberof HttpResponse
     */
    getCookies(): {
        [key: string]: {
            value: string | undefined;
            options: CookieOptions;
        };
    };
}
/**
 * Check if an object is an instance of HttpResponse.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponse} - True if the error is an instance of HttpResponse. False otherwise.
 */
export declare function isHttpResponse(obj: any): obj is HttpResponse;
/**
 * Represent an HTTP response with a success status 2xx.
 *
 * @export
 * @abstract
 * @class HttpResponseSuccess
 * @extends {HttpResponse}
 */
export declare abstract class HttpResponseSuccess<T = any> extends HttpResponse<T> {
    /**
     * Property used internally by isHttpResponseSuccess.
     *
     * @memberof HttpResponseSuccess
     */
    readonly isHttpResponseSuccess = true;
    /**
     * Create an instance of HttpResponseSuccess.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseSuccess
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseSuccess.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseSuccess} - True if the error is an instance of HttpResponseSuccess. False otherwise.
 */
export declare function isHttpResponseSuccess(obj: any): obj is HttpResponseSuccess;
/**
 * Represent an HTTP response with the status 200 - OK.
 *
 * @export
 * @class HttpResponseOK
 * @extends {HttpResponseSuccess}
 */
export declare class HttpResponseOK<T = any> extends HttpResponseSuccess<T> {
    /**
     * Property used internally by isHttpResponseOK.
     *
     * @memberof HttpResponseOK
     */
    readonly isHttpResponseOK = true;
    readonly statusCode = 200;
    readonly statusMessage = "OK";
    /**
     * Create an instance of HttpResponseOK.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseOK
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseOK.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseOK} - True if the error is an instance of HttpResponseOK. False otherwise.
 */
export declare function isHttpResponseOK(obj: any): obj is HttpResponseOK;
/**
 * Represent an HTTP response with the status 201 - CREATED.
 *
 * @export
 * @class HttpResponseCreated
 * @extends {HttpResponseSuccess}
 */
export declare class HttpResponseCreated<T = any> extends HttpResponseSuccess<T> {
    /**
     * Property used internally by isHttpResponseCreated.
     *
     * @memberof HttpResponseCreated
     */
    readonly isHttpResponseCreated = true;
    readonly statusCode = 201;
    readonly statusMessage = "CREATED";
    /**
     * Create an instance of HttpResponseCreated.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseCreated
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseCreated.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseCreated} - True if the error is an instance of HttpResponseCreated. False otherwise.
 */
export declare function isHttpResponseCreated(obj: any): obj is HttpResponseCreated;
/**
 * Represent an HTTP response with the status 204 - NO CONTENT.
 *
 * @export
 * @class HttpResponseNoContent
 * @extends {HttpResponseSuccess}
 */
export declare class HttpResponseNoContent extends HttpResponseSuccess {
    /**
     * Property used internally by is HttpResponseNoContent.
     *
     * @memberof HttpResponseNoContent
     */
    readonly isHttpResponseNoContent = true;
    readonly statusCode = 204;
    readonly statusMessage = "NO CONTENT";
    /**
     * Create an instance of HttpResponseNoContent.
     * @memberof HttpResponseNoContent
     */
    constructor();
}
/**
 * Check if an object is an instance of HttpResponseNoContent.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseNoContent} - True if the error is an instance of HttpResponseNoContent. False otherwise.
 */
export declare function isHttpResponseNoContent(obj: any): obj is HttpResponseNoContent;
/**
 * Represent an HTTP response with a redirection status 3xx.
 *
 * @export
 * @abstract
 * @class HttpResponseRedirection
 * @extends {HttpResponse}
 */
export declare abstract class HttpResponseRedirection<T = any> extends HttpResponse<T> {
    /**
     * Property used internally by isHttpResponseRedirection.
     *
     * @memberof HttpResponseRedirection
     */
    readonly isHttpResponseRedirection = true;
    /**
     * Create an instance of HttpResponseRedirection.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseRedirection
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseRedirection.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseRedirection} - True if the error is an instance of HttpResponseRedirection.
 * False otherwise.
 */
export declare function isHttpResponseRedirection(obj: any): obj is HttpResponseRedirection;
/**
 * Represent an HTTP response with the status 301 - MOVED PERMANENTLY.
 *
 * @export
 * @class HttpResponseMovedPermanently
 * @extends {HttpResponseRedirection}
 */
export declare class HttpResponseMovedPermanently extends HttpResponseRedirection {
    path: string;
    /**
     * Property used internally by isHttpResponseMovedPermanently.
     *
     * @memberof isHttpResponseMovedPermanently
     */
    readonly isHttpResponseMovedPermanently = true;
    readonly statusCode = 301;
    readonly statusMessage = "MOVED PERMANENTLY";
    /**
     * Create an instance of HttpResponseMovedPermanently.
     * @param {string} path - The redirection path.
     * @memberof HttpResponseMovedPermanently
     */
    constructor(path: string);
}
/**
 * Check if an object is an instance of HttpResponseMovedPermanently.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseMovedPermanently} - True if the error is an
 * instance of HttpResponseMovedPermanently. False otherwise.
 */
export declare function isHttpResponseMovedPermanently(obj: any): obj is HttpResponseMovedPermanently;
/**
 * Represent an HTTP response with the status 302 - FOUND.
 *
 * @export
 * @class HttpResponseRedirect
 * @extends {HttpResponseRedirection}
 */
export declare class HttpResponseRedirect<T = any> extends HttpResponseRedirection<T> {
    path: string;
    /**
     * Property used internally by isHttpResponseRedirect.
     *
     * @memberof HttpResponseRedirect
     */
    readonly isHttpResponseRedirect = true;
    readonly statusCode = 302;
    readonly statusMessage = "FOUND";
    /**
     * Create an instance of HttpResponseRedirect.
     * @param {string} path - The redirection path.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseRedirect
     */
    constructor(path: string, body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseRedirect.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseRedirect} - True if the error is an instance of HttpResponseRedirect. False otherwise.
 */
export declare function isHttpResponseRedirect(obj: any): obj is HttpResponseRedirect;
/**
 * Represent an HTTP response with a client error status 4xx.
 *
 * @export
 * @abstract
 * @class HttpResponseClientError
 * @extends {HttpResponse}
 */
export declare abstract class HttpResponseClientError<T = any> extends HttpResponse<T> {
    /**
     * Property used internally by isHttpResponseClientError.
     *
     * @memberof HttpResponseClientError
     */
    readonly isHttpResponseClientError = true;
    /**
     * Create an instance of HttpResponseClientError.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseClientError
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseClientError.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseClientError} - True if the error is an instance of HttpResponseClientError.
 * False otherwise.
 */
export declare function isHttpResponseClientError(obj: any): obj is HttpResponseClientError;
/**
 * Represent an HTTP response with the status 400 - BAD REQUEST.
 *
 * @export
 * @class HttpResponseBadRequest
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseBadRequest<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseBadRequest.
     *
     * @memberof HttpResponseBadRequest
     */
    readonly isHttpResponseBadRequest = true;
    readonly statusCode = 400;
    readonly statusMessage = "BAD REQUEST";
    /**
     * Create an instance of HttpResponseBadRequest.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseBadRequest
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseBadRequest.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseBadRequest} - True if the error is an instance of HttpResponseBadRequest.
 * False otherwise.
 */
export declare function isHttpResponseBadRequest(obj: any): obj is HttpResponseBadRequest;
/**
 * Represent an HTTP response with the status 401 - UNAUTHORIZED.
 *
 * @export
 * @class HttpResponseUnauthorized
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseUnauthorized<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseUnauthorized.
     *
     * @memberof HttpResponseUnauthorized
     */
    readonly isHttpResponseUnauthorized = true;
    readonly statusCode = 401;
    readonly statusMessage = "UNAUTHORIZED";
    /**
     * Create an instance of HttpResponseUnauthorized.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseUnauthorized
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseUnauthorized.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseUnauthorized} - True if the error is an instance of HttpResponseUnauthorized.
 * False otherwise.
 */
export declare function isHttpResponseUnauthorized(obj: any): obj is HttpResponseUnauthorized;
/**
 * Represent an HTTP response with the status 403 - FORBIDDEN.
 *
 * @export
 * @class HttpResponseForbidden
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseForbidden<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseForbidden.
     *
     * @memberof HttpResponseForbidden
     */
    readonly isHttpResponseForbidden = true;
    readonly statusCode = 403;
    readonly statusMessage = "FORBIDDEN";
    /**
     * Create an instance of HttpResponseForbidden.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseForbidden
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseForbidden.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseForbidden} - True if the error is an instance of HttpResponseForbidden. False otherwise.
 */
export declare function isHttpResponseForbidden(obj: any): obj is HttpResponseForbidden;
/**
 * Represent an HTTP response with the status 404 - NOT FOUND.
 *
 * @export
 * @class HttpResponseNotFound
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseNotFound<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseNotFound.
     *
     * @memberof HttpResponseNotFound
     */
    readonly isHttpResponseNotFound = true;
    readonly statusCode = 404;
    readonly statusMessage = "NOT FOUND";
    /**
     * Create an instance of HttpResponseNotFound.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseNotFound
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseNotFound.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseNotFound} - True if the error is an instance of HttpResponseNotFound. False otherwise.
 */
export declare function isHttpResponseNotFound(obj: any): obj is HttpResponseNotFound;
/**
 * Represent an HTTP response with the status 405 - METHOD NOT ALLOWED.
 *
 * @export
 * @class HttpResponseMethodNotAllowed
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseMethodNotAllowed<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseMethodNotAllowed.
     *
     * @memberof HttpResponseMethodNotAllowed
     */
    readonly isHttpResponseMethodNotAllowed = true;
    readonly statusCode = 405;
    readonly statusMessage = "METHOD NOT ALLOWED";
    /**
     * Create an instance of HttpResponseMethodNotAllowed.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseMethodNotAllowed
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseMethodNotAllowed.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseMethodNotAllowed} - True if the error is an instance of HttpResponseMethodNotAllowed.
 * False otherwise.
 */
export declare function isHttpResponseMethodNotAllowed(obj: any): obj is HttpResponseMethodNotAllowed;
/**
 * Represent an HTTP response with the status 409 - CONFLICT.
 *
 * @export
 * @class HttpResponseConflict
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseConflict<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseConflict.
     *
     * @memberof HttpResponseConflict
     */
    readonly isHttpResponseConflict = true;
    readonly statusCode = 409;
    readonly statusMessage = "CONFLICT";
    /**
     * Create an instance of HttpResponseConflict.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseConflict
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseConflict.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseConflict} - True if the error is an instance of HttpResponseConflict. False otherwise.
 */
export declare function isHttpResponseConflict(obj: any): obj is HttpResponseConflict;
/**
 * Represent an HTTP response with the status 429 - TOO MANY REQUESTS.
 *
 * @export
 * @class HttpResponseTooManyRequests
 * @extends {HttpResponseClientError}
 */
export declare class HttpResponseTooManyRequests<T = any> extends HttpResponseClientError<T> {
    /**
     * Property used internally by isHttpResponseTooManyRequests.
     *
     * @memberof HttpResponseTooManyRequests
     */
    readonly isHttpResponseTooManyRequests = true;
    readonly statusCode = 429;
    readonly statusMessage = "TOO MANY REQUESTS";
    /**
     * Create an instance of HttpResponseTooManyRequests.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseTooManyRequests
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseTooManyRequests.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseTooManyRequests} - True if the error is an instance of HttpResponseTooManyRequests.
 * False otherwise.
 */
export declare function isHttpResponseTooManyRequests(obj: any): obj is HttpResponseTooManyRequests;
/**
 * Represent an HTTP response with a server error status 5xx.
 *
 * @export
 * @abstract
 * @class HttpResponseServerError
 * @extends {HttpResponse}
 */
export declare abstract class HttpResponseServerError<T = any> extends HttpResponse<T> {
    /**
     * Property used internally by isHttpResponseServerError.
     *
     * @memberof HttpResponseServerError
     */
    readonly isHttpResponseServerError = true;
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseServerError.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseServerError} - True if the error is an instance of HttpResponseServerError.
 * False otherwise.
 */
export declare function isHttpResponseServerError(obj: any): obj is HttpResponseServerError;
/**
 * Represent an HTTP response with the status 500 - INTERNAL SERVER ERROR.
 *
 * @export
 * @class HttpResponseInternalServerError
 * @extends {HttpResponseServerError}
 */
export declare class HttpResponseInternalServerError<T = any> extends HttpResponseServerError<T> {
    /**
     * Property used internally by isHttpResponseInternalServerError.
     *
     * @memberof HttpResponseInternalServerError
     */
    readonly isHttpResponseInternalServerError = true;
    readonly error?: Error;
    readonly ctx?: Context;
    readonly statusCode = 500;
    readonly statusMessage = "INTERNAL SERVER ERROR";
    /**
     * Create an instance of HttpResponseInternalServerError.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseInternalServerError
     */
    constructor(body?: T, options?: {
        stream?: boolean;
        error?: Error;
        ctx?: Context;
    });
}
/**
 * Check if an object is an instance of HttpResponseInternalServerError.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseInternalServerError} - True if the error is an instance of
 * HttpResponseInternalServerError. False otherwise.
 */
export declare function isHttpResponseInternalServerError(obj: any): obj is HttpResponseInternalServerError;
/**
 * Represent an HTTP response with the status 501 - NOT IMPLEMENTED.
 *
 * @export
 * @class HttpResponseNotImplemented
 * @extends {HttpResponseServerError}
 */
export declare class HttpResponseNotImplemented<T = any> extends HttpResponseServerError<T> {
    /**
     * Property used internally by isHttpResponseNotImplemented.
     *
     * @memberof HttpResponseNotImplemented
     */
    readonly isHttpResponseNotImplemented = true;
    readonly statusCode = 501;
    readonly statusMessage = "NOT IMPLEMENTED";
    /**
     * Create an instance of HttpResponseNotImplemented.
     * @param {*} [body] - Optional body of the response.
     * @memberof HttpResponseNotImplemented
     */
    constructor(body?: T, options?: {
        stream?: boolean;
    });
}
/**
 * Check if an object is an instance of HttpResponseNotImplemented.
 *
 * This function is a help when you have several packages using @foal/core.
 * Npm can install the package several times, which leads to duplicate class
 * definitions. If this is the case, the keyword `instanceof` may return false
 * while the object is an instance of the class. This function fixes this
 * problem.
 *
 * @export
 * @param {*} obj - The object to check.
 * @returns {obj is HttpResponseNotImplemented} - True if the error is an instance of HttpResponseNotImplemented.
 * False otherwise.
 */
export declare function isHttpResponseNotImplemented(obj: any): obj is HttpResponseNotImplemented;