static boolean block_level_start(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "block_level_start")) return false;
    boolean r;
    r = statement_start(b, l + 1);
    if (!r) r = class_level_start(b, l + 1);
    return r;
  }
static boolean block_level_start(PsiBuilder b, int l)