static boolean implements_list_item(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "implements_list_item")) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = implements_list_item_0(b, l + 1);
    if (!r) r = implement_list_item_recovered(b, l + 1);
    exit_section_(b, m, null, r);
    return r;
  }
static boolean implements_list_item(PsiBuilder b, int l)