private static boolean flat_pattern_0(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "flat_pattern_0")) return false;
    boolean r;
    r = consumeToken(b, PATTERN_IDENTIFIER);
    if (!r) r = consumeToken(b, PATTERN_WHITE_SPACE);
    return r;
  }
private static boolean flat_pattern_0(PsiBuilder b, int l)