@Nullable
  @Override
  public StructureViewBuilder getStructureViewBuilder(@NotNull final PsiFile psiFile) {
    return new TreeBasedStructureViewBuilder() {
      @NotNull
      @Override
      public StructureViewModel createStructureViewModel(@Nullable Editor editor) {
        return new MarkdownStructureViewModel(psiFile, editor);
      }

      @Override
      public boolean isRootNodeShown() {
        return false;
      }
    };
  }
@Nullable
  @Override
  public StructureViewBuilder getStructureViewBuilder(@NotNull final PsiFile psiFile)