public static boolean open_block(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "open_block")) return false;
    if (!nextTokenIs(b, T_LBRACE)) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = open_block_impl(b, l + 1);
    exit_section_(b, m, OPEN_BLOCK, r);
    return r;
  }
public static boolean open_block(PsiBuilder b, int l)