code: function moveToTrash(path, callback) {
          appshell.fs.moveToTrash(path, function (err) {
              callback(_mapError(err));
          });
      }
docs: Move the file or directory at the given path to a system dependent trash
  location, calling back asynchronously with a possibly null FileSystemError
  string. Directories will be moved even when non-empty.
  
  @param {string} path
  @param {function(string)=} callback