@Nullable
  private static LighterASTNode findExpressionChild(@NotNull LighterASTNode element, LighterAST tree) {
    return LightTreeUtil.firstChildOfType(tree, element, ElementType.EXPRESSION_BIT_SET);
  }
@Nullable
  private static LighterASTNode findExpressionChild(@NotNull LighterASTNode element, LighterAST tree)