public AnAction addComponent(JBSplitter splitter) {
    updateStubDetailsTreeView(PropertiesComponent.getInstance().getBoolean(PROPERTY_NAME, DEFAULT_SHOW_STUB_DETAILS), splitter);

    return new ToggleAction(DevPsiViewerBundle.message("action.show.stub.details.text"), null, AllIcons.Actions.PreviewDetails) {
      @Override
      public boolean isSelected(@NotNull AnActionEvent e) {
        return PropertiesComponent.getInstance().getBoolean(PROPERTY_NAME, DEFAULT_SHOW_STUB_DETAILS);
      }

      @Override
      public void setSelected(@NotNull AnActionEvent e, boolean state) {
        PropertiesComponent.getInstance().setValue(PROPERTY_NAME, state, DEFAULT_SHOW_STUB_DETAILS);
        updateStubDetailsTreeView(state, splitter);
        if (state) {
          valueChanged(myStubViewerTree.getSelectedStub());
        }
      }

      @Override
      public @NotNull ActionUpdateThread getActionUpdateThread() {
        return ActionUpdateThread.BGT;
      }
    };
  }
public AnAction addComponent(JBSplitter splitter)