clear() {
    this._cb = null;
    this.isActive = false;
    this._onceActive = this._onceActiveProm = null;
    return this;
  }
/**
   * Clear any function set with the using method.
   * @returns {Action} for chaining
   * @see {@link using}
   */
Clear any function set with the using method.
@returns {Action} for chaining
@see  using
Clear any function set with the using method . @returns { Action } for chaining @see using
clear() {
    this._cb = null;
    this.isActive = false;
    this._onceActive = this._onceActiveProm = null;
    return this;
  }
clear ( ) { this . _cb = null ; this . isActive = false ; this . _onceActive = this . _onceActiveProm = null ; return this ; }
Clear any function set with the using method.
Clear any function set with the using method .