public @Nullable HgCommandResult execute(@NotNull ModalityState state) {
    final List<String> arguments = new LinkedList<>();
    arguments.add(source);
    final HgRemoteCommandExecutor executor = new HgRemoteCommandExecutor(project, source, state, false);
    executor.setSilent(true);
    return executor.executeInCurrentThread(null, "identify", arguments);
  }
public @Nullable HgCommandResult execute(@NotNull ModalityState state)