@Nullable
    @Override
    protected Object findAcceptableElement(PsiElement element) {
      // walk up the psi-tree until we find an element from the structure view
      while (element != null && !(element instanceof PsiFile) && !PRESENTABLE_TYPES.contains(PsiUtilCore.getElementType(element))) {
        IElementType parentType = PsiUtilCore.getElementType(element.getParent());

        final PsiElement previous = element.getPrevSibling();
        if (previous == null || !TRANSPARENT_CONTAINERS.contains(parentType)) {
          element = element.getParent();
        }
        else {
          element = previous;
        }
      }

      return element;
    }
@Nullable
    @Override
    protected Object findAcceptableElement(PsiElement element)