docs: function hasCompleteEventParams(eventType, listener) {
          var hasParams = eventType && listener,
              isTypeString = typeof eventType === 'string',
              isTypeFunction = typeof listener === 'function';
  
          if (!isTypeFunction) {
              throw new TypeError(EventDispatcher.TYPE_ERROR);
          }
  
          return hasParams && isTypeString && isTypeFunction;
      }