static L<S> tok_splitAtCommaOrDoubleArrow(S s) {
  ret tok_splitAtCommaOrDoubleArrow(javaTok(s));
}
  
static L<S> tok_splitAtCommaOrDoubleArrow(L<S> tok) {
  LS l = tok_splitAtDoubleArrow(tok);
  if (l(l) > 1) ret tok;
  ret tok_splitAtComma(tok);
}