code: function Server(options) {
    this.handlers = {};
    var server = new grpc.Server(options);
    this._server = server;
    this.started = false;
  }
docs: Constructs a server object that stores request handlers and delegates
  incoming requests to those handlers
  @memberof grpc
  @constructor
  @param {Object=} options Options that should be passed to the internal server
  implementation
  @example
  var server = new grpc.Server();
  server.addProtoService(protobuf_service_descriptor, service_implementation);
  server.bind('address:port', server_credential);
  server.start();