static L<S> ai_splitAroundPhrase_orNull(S s, S phrase) {
  ret ai_splitAroundPhrase_orNull(javaTokWithBrackets(s), phrase);
}
  
static L<S> ai_splitAroundPhrase_orNull(LS tok, S phrase) {
  S[] _phrase = toStringArray(javaTokC(phrase));
  int i = findCodeTokensIC(tok, _phrase);
  ret i < 0 ? null : ll(trimJoinSubList(tok, 0, i), trimJoinSubList(tok, i+l(_phrase)*2));
}