static Cl<Pair<S, Set<S>>> dm_topDownParseToGroupings_withUsedPatterns(S input, Cl<S> patterns) {
  replace GroupingAndPatterns with Pair<S, Set<S>>.
  
  S parser = dm_makeModule("#1027108/TopDownParsing");
  ret (Cl<GroupingAndPatterns>) dm_callWithImport(parser, 'parseToGroupingsWithUsedPatterns, input, +patterns);
}