code: function postToFirstAvailableServer (destinationNode, signallingServers, path, message) {
  
          return new Promise(function (resolve, reject) {
              if (signallingServers.length === 0) {
                  reject(new Utils.UnreachableError(createUnreachableErrorMessage(destinationNode)));
              }
              else {
                  //noinspection JSCheckFunctionSignatures
                  httpRequestService.post(url.resolve(signallingServers[0].signallingApiBase, path), message)
                      .then(resolve)
                      .catch(function (error) {
                          logger.warn("An error occurred sending signalling message using " + signallingServers[0].signallingApiBase + " trying next signalling server", error);
                          postToFirstAvailableServer(destinationNode, signallingServers.slice(1), path, message).then(resolve, reject);
                      });
              }
          });
      }
docs: Post an object to the first available signalling server
  
  @param destinationNode
  @param signallingServers
  @param path
  @param message
  @returns {Promise}