export declare function isUndefined(value?: any): boolean;
export declare function isObject(value?: any): boolean;
export declare function isNonEmptyString(value?: any): boolean;
export declare function isBoolean(value?: any): boolean;
export declare function isWebUrl(value?: any): boolean;
export declare function isSchemeAndAuthorityOnlyUrl(value: any): boolean;
export declare function isValidCredential(value: any): boolean;
export declare function isValidRequestOptions(value: any): boolean;
export declare function isValidHintOptions(value: any): boolean;
export declare function isValidProxyLoginResponse(value: any): boolean;
export declare function isValidError(value: any): boolean;
export declare function isValidDisplayOptions(value: any): boolean;