code: function _handleKey(character, modifiers, e) {
          var self = this;
  
          if (!self.recording) {
              _origHandleKey.apply(self, arguments);
              return;
          }
  
          // remember this character if we're currently recording a sequence
          if (e.type == 'keydown') {
              if (character.length === 1 && _recordedCharacterKey) {
                  _recordCurrentCombo();
              }
  
              for (i = 0; i < modifiers.length; ++i) {
                  _recordKey(modifiers[i]);
              }
              _recordKey(character);
  
          // once a key is released, all keys that were held down at the time
          // count as a keypress
          } else if (e.type == 'keyup' && _currentRecordedKeys.length > 0) {
              _recordCurrentCombo();
          }
      }
docs: handles a character key event
  
  @param {string} character
  @param {Array} modifiers
  @param {Event} e
  @returns void