static LS matchingPatternsInJavaXSource(S src) {
  L<S> patterns = mL("JavaX patterns matching patterns");
  final LS tok = javaTok(loadSnippetOrKeep(src));
  ret uniquifyCI(concatMap(patterns, func(S pat) -> LS {
    map firstQuotedToken(jextractAll(pat, tok))
  }));
}