src/libs/Bus.js
function _getChannelEvents(sChannelId, sEvent) {
  if (oChannels[sChannelId] === und) {
    oChannels[sChannelId] = {};
  }
  if (oChannels[sChannelId][sEvent] === und) {
    oChannels[sChannelId][sEvent] = [];
  }
  return oChannels[sChannelId][sEvent];
}
function _getChannelEvents(sChannelId, sEvent) {
  if (oChannels[sChannelId] === und) {
    oChannels[sChannelId] = {};
  }
  if (oChannels[sChannelId][sEvent] === und) {
    oChannels[sChannelId][sEvent] = [];
  }
  return oChannels[sChannelId][sEvent];
}
_getChannelEvents return the events array in channel.
@param {String} sChannelId
@param {String} sEvent
@return {Object}
@private