/**
 * Turn an object into FormData while keeping its object type
 * @template {Record<string, any>} T
 * @param {T} [body] The object to convert to FormData
 * @returns {T} FormData cast to the original type
 */
export declare function formdataBodySerializer<T extends Record<string, any>>(body?: T): T;
/**
 * Checks if an object contains a file or a blob
 * Skips objects already transformed into FormData
 * @param {Record<string, any> | FormData} [body] The object to check
 */
export declare function containsFileOrBlob(body: Record<string, any> | FormData): boolean;
/**
 * Fill a path with parameters
 * @param {string} path The path template with {param} placeholders
 * @param {Record<string, unknown>} [params] Parameters to fill
 */
export declare function fillPath(path: string, params?: Record<string, unknown>): string;
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