static LPair<S> tok_typesAndNamesOfFunctionDef(LS tok) {
  LS tokF = first(findFullFunctionDefs(tok, false));
  ret tokF == null ? null : tok_typesAndNamesOfParams(subList(tokF, tok_findArgs(tokF)));
}

static LPair<S> tok_typesAndNamesOfFunctionDef(S src) {
  ret tok_typesAndNamesOfFunctionDef(javaTok(src));
}