@Override
    public void visitLambdaExpression(@NotNull PsiLambdaExpression lambdaExpression) {
      super.visitLambdaExpression(lambdaExpression);
      if (lambdaExpression.getBody() instanceof PsiExpression) {
        registerError(lambdaExpression);
      }
    }
@Override
    public void visitLambdaExpression(@NotNull PsiLambdaExpression lambdaExpression)