public static boolean marker_op(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "marker_op")) return false;
    boolean r;
    Marker m = enter_section_(b, l, _NONE_, MARKER_OP, "<marker op>");
    r = consumeToken(b, VERSION_CMP);
    if (!r) r = consumeToken(b, IN);
    if (!r) r = parseTokens(b, 0, NOT, IN);
    exit_section_(b, l, m, r, false, null);
    return r;
  }
public static boolean marker_op(PsiBuilder b, int l)