code: function _read2store(stat, dest, source, callback) {
    _read(stat, source, _pipe.bind(null, _store.bind(null, dest), callback));
  }
docs: Analyzes fs structure and stores the data in json file.
  This is high level utility. It pipes result of _read to _store.
  @param {Function} stat - Function of fs module fs.stat or fs.lstat.
  @param {String} dest - File system path of the new file.
  @param {String} source - Path to source location on file system.
  @param {Function} callback - Callback that expects only a possible
  error.