code: function setUpReadable(stream, deserialize) {
    stream.deserialize = common.wrapIgnoreNull(deserialize);
    stream.finished = false;
    stream.reading = false;
  
    stream.terminate = function() {
      stream.finished = true;
      stream.on('data', function() {});
    };
  
    stream.on('cancelled', function() {
      stream.terminate();
    });
  }
docs: Initialize a readable stream. This is used for both the readable and duplex
  stream constructors.
  @private
  @param {Readable} stream The stream to initialize
  @param {grpc~deserialize} deserialize Deserialization function for
  incoming data.