code: function (lstCfg, itfWrap) {
                  for (var evt in lstCfg) {
                      if (lstCfg.hasOwnProperty(evt)) {
                          lstCfg[evt].listenOnce = true;
                      }
                  }
                  this.$addListeners(lstCfg, itfWrap);
              }
docs: Adds a listener to an event, and removes it right after the event has been raised. Please refer to
  $addListeners() for parameters description
  @param {Object} lstCfg
  @param {Object} itfWrap