code: function(connection, collection, functionName) {
        var args = Array.prototype.slice.call(arguments, 3);
        return connections[connection].runFunction(functionName, args);
      }
docs: Run Function
  
  Run an OrientDB server side function
  
  @param {Object} connection
  @param {Object} collection
  @param {String} functionName - the name of the server function
  @param {...Object} object - will be passed to server function