src/fs.js
function _readFileOnEnd(filename, contents, cache) {
  loading--;
  const data = Buffer.concat(contents);
  cache.set(filename, data);
  _fireReadFileCallbacks(filename, data);
  _runFileQueue();
}
function _readFileOnEnd(filename, contents, cache) {
  loading--;
  const data = Buffer.concat(contents);
  cache.set(filename, data);
  _fireReadFileCallbacks(filename, data);
  _runFileQueue();
}
function _readFileOnEnd ( filename , contents , cache ) { loading -- ; const data = Buffer . concat ( contents ) ; cache . set ( filename , data ) ; _fireReadFileCallbacks ( filename , data ) ; _runFileQueue ( ) ; }
On end listener for readFile.

@private
@param {string} filename           The filename.
@param {Array.<Buffer>} contents   The file contents as a series of buffers.
@param {Map} cache                 The file cache.
On end listener for readFile .