anchor.diff:          return filesystem.connection
               .uploadObject(
                   filesystem.bucket,
  -                path,
  +                _objectName,
                   source,
                   params: {'fields': 'name'}
               )
  
positive.code: class RemoteFile extends RemoteEntry {
    static final RegExp FILE_PATH = new RegExp(r'(/[^\s/]+)+$');
  
  
    RemoteFile(filesystem, path):
        super._(filesystem, path)  {
      if (FILE_PATH.matchAsPrefix(path) == null)
  
negative.code:   Future<RemoteFile> moveTo(RemoteFile file) {
      return copyTo(file)
          .then((file) {
            return this.delete()
                .then((_) => file);
          });
    }
  
  