function subscribersByEvent(oChannel, sEventName) {
  let aSubscribers = [];
  if (!isTypeOf(oChannel, sNotDefined)) {
    iterateObject(oChannel, function (oItem, sKey) {
      if (sKey === sEventName) {
        aSubscribers = oItem;
      }
    });
  }
  return aSubscribers;
}
function subscribersByEvent(oChannel, sEventName) {
  let aSubscribers = [];
  if (!isTypeOf(oChannel, sNotDefined)) {
    iterateObject(oChannel, function (oItem, sKey) {
      if (sKey === sEventName) {
        aSubscribers = oItem;
      }
    });
  }
  return aSubscribers;
}
function subscribersByEvent ( oChannel , sEventName ) { let aSubscribers = [ ] ; if ( ! isTypeOf ( oChannel , sNotDefined ) ) { iterateObject ( oChannel , function ( oItem , sKey ) { if ( sKey === sEventName ) { aSubscribers = oItem ; } } ) ; } return aSubscribers ; }
subscribersByEvent return all the subscribers of the event in the channel.
@param {Object} oChannel
@param {String} sEventName
@return {Array<Object>}
@private
subscribersByEvent return all the subscribers of the event in the channel .