/**
 * Represents a set of URL query search parameters.
 * @public
 */
export declare class UrlQueryParams {
    private readonly _list;
    /**
     * Constructs a new UrlSearchParams from a query string, an object of parameters and values, or another
     * UrlSearchParams.
     */
    constructor(input?: string | {
        [id: string]: string | Array<string>;
    } | UrlQueryParams);
    /**
     * Appends a new value to the set of values for a key.
     *
     * @public
     * @param key - The key to add a value for
     * @param value - The value to add
     */
    append(key: string, value: string): void;
    /**
     * Deletes all values for a key.
     *
     * @public
     * @param key - The key whose values are to be removed
     */
    delete(key: string): void;
    /**
     * Returns the first value associated with a key.
     *
     * @public
     * @param key - The key to return the first value for
     * @returns The first string value for the key
     */
    get(key: string): string | undefined;
    /**
     * Returns all the values associated with a key.
     *
     * @public
     * @param key  -The key to return all values for
     * @returns An array of strings containing all values for the key
     */
    getAll(key: string): Array<string> | undefined;
    /**
     * Returns true if a key has been set to any value, false otherwise.
     *
     * @public
     * @param key - The key to test for existence
     * @returns A boolean indicating if the key has been set
     */
    has(key: string): boolean;
    /**
     * Returns an array of all keys which have been set.
     *
     * @public
     * @returns An array of strings containing all keys set in the UrlSearchParams instance
     */
    keys(): Array<string>;
    /**
     * Sets the value associated with a key.
     *
     * @public
     * @param key - The key to set the value of
     */
    set(key: string, value: string): void;
    /**
     * Returns this object's data as an encoded query string.
     *
     * @public
     * @returns A string in application/x-www-form-urlencoded format containing all of the set keys/values
     */
    toString(): string;
    /**
     * Parses a query string, returning a index object.
     *
     * @private
     */
    private parseQueryString;
}
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