import { HttpOptions } from '../../core';
export declare class FormUrlEncoded {
    private readonly contentTypeVars;
    private readonly optsBuilder;
    private readonly _params;
    private _boundary;
    constructor(params: string[], options?: HttpOptions);
    static of<T>(json: T, extras?: HttpOptions): FormUrlEncoded;
    configure(charset: string, boundary?: string): FormUrlEncoded;
    getOptions(charset?: string, boundary?: string): HttpOptions;
    readonly options: HttpOptions;
    readonly body: string;
}