static boolean single_parameter_lambda_body(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "single_parameter_lambda_body")) return false;
    boolean r;
    r = expression_single_parameter_lambda_body(b, l + 1);
    if (!r) r = lazy_block_lambda_body(b, l + 1);
    return r;
  }
static boolean single_parameter_lambda_body(PsiBuilder b, int l)