code: function () {
        var i;
        for (i = 0; i < arguments.length; i++) {
           if ( ! (this.has_activity_completed(arguments[i]) || this.has_lambda_completed(arguments[i]) || this.childworkflow_completed(arguments[i])  || this.timer_fired(arguments[i]) ) ) {
              return false;
           }
        }
        return true;
     }
docs: Return true if all the arguments are completed
  @param {String} [...]
  @returns {Boolean}