Function flow

lib/internal/streams/readable.js:1304–1308

(stream)

};

function flow(stream) {
  const state = stream._readableState;
  debug('flow');
  while ((state[kState] & kFlowing) !== 0 && stream.read() !== null);
}

// Wrap an old-style stream as the async data source.
// This is *not* part of the readable stream interface.