@NotNull
  GitCommandResult merge(@NotNull GitRepository repository, @NotNull String branchToMerge, @Nullable List<String> additionalParams,
                         GitLineHandlerListener @NotNull ... listeners);
@NotNull
  GitCommandResult merge(@NotNull GitRepository repository, @NotNull String branchToMerge, @Nullable List<String> additionalParams,
                         GitLineHandlerListener @NotNull ... listeners)