/**
 * Marks the function as `hears` function meaning that the function will be
 * executed when the user message matches the given string exactly, or matches
 * to a given regular expression.
 *
 * When the match occurs with RegExp, then the matched groups will be passed as
 * the parameters of the function where the full-match is the last parameter
 * and the parameters starts from the first group.
 *
 * @export
 * @param {(IHearsDecoratorOpts | string)} opts Options or the exact match.
 * @returns Method Decorator
 */
export declare function hears(opts: IHearsDecoratorOpts | string): <T extends (...args: any[]) => any = (...args: any[]) => any>(target: any, propName: string, descriptor?: TypedPropertyDescriptor<T> | undefined) => TypedPropertyDescriptor<T> | undefined;