This file is indexed.

/usr/lib/nodejs/stream-shift/index.js is in node-stream-shift 1.0.0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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module.exports = shift

function shift (stream) {
  var rs = stream._readableState
  if (!rs) return null
  return rs.objectMode ? stream.read() : stream.read(getStateLength(rs))
}

function getStateLength (state) {
  if (state.buffer.length) {
    // Since node 6.3.0 state.buffer is a BufferList not an array
    if (state.buffer.head) {
      return state.buffer.head.data.length
    }

    return state.buffer[0].length
  }

  return state.length
}