svoid lambdaMapLike testTranspilationFunction(IVF1<LS> f, S in, S out, S... moreInOut) {
  LS tok = jtok(in);
  f.get(tok);
  assertEqualsVerboseUnder(src -> join(javaTok_simpleSpacesAndTrim(src)), out, join(tok));
  fOr (PairS p : paramsToPairs(moreInOut))
    testTranspilationFunction(f, p.a, p.b);
}

sS testTranspilationFunction(IVF1<LS> f, S s) {
  ret applyTranspilationFunction(f, s);
}