code: function(msg) {
          //got a description, is it any good?
          var loaded = (this.loadFnState(msg.getPayload()));
  
          if (this._describeDfd) {
              if (loaded) {
                  this._describeDfd.resolve();
              }
              else {
                  this._describeDfd.reject("something went wrong parsing function state")
              }
          }
          //else { //hmm, unsolicited response, that's okay. }
      }
docs: On any describe return back from the core
  @param msg