@Override
  public void registerExtraPanelActions(@NotNull DefaultActionGroup actionGroup, @NotNull SliceTreeBuilder sliceTreeBuilder) {
    if (sliceTreeBuilder.dataFlowToThis) {
      actionGroup.add(new GroupByLeavesAction(sliceTreeBuilder));
      actionGroup.add(new CanItBeNullAction(sliceTreeBuilder));
    }
  }
@Override
  public void registerExtraPanelActions(@NotNull DefaultActionGroup actionGroup, @NotNull SliceTreeBuilder sliceTreeBuilder)