private @NotNull List<ShowInExternalToolAction> getShowActions() {
      Map<ExternalToolGroup, List<ExternalTool>> externalTools = ExternalDiffSettings.getInstance().getExternalTools();
      List<ExternalTool> diffTools = externalTools.getOrDefault(ExternalToolGroup.DIFF_TOOL, Collections.emptyList());

      return ContainerUtil.map(diffTools, ShowInExternalToolAction::new);
    }
private @NotNull List<ShowInExternalToolAction> getShowActions()