public static boolean gstring(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "gstring")) return false;
    if (!nextTokenIsSmart(b, GSTRING_BEGIN)) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = compound_string(b, l + 1, GSTRING_BEGIN_parser_, GroovyGeneratedParser::fast_string_content, GSTRING_END_parser_);
    exit_section_(b, m, GSTRING, r);
    return r;
  }
public static boolean gstring(PsiBuilder b, int l)