// returns pair(functionName, args)
static Pair<S, L<S>> tok_parseFunctionCall(S s) {
  ret tok_parseFunctionCall(javaTok(s));
}
  
static Pair<S, L<S>> tok_parseFunctionCall(L<S> tok) {
  if (!(isIdentifier(get(tok, 1)) && eqGet(tok, 3, "("))) null;
  Map<Int> bracketMap = getBracketMap(tok);
  Int iClosing = bracketMap.get(3);
  if (!(eq(iClosing, l(tok)-4) && eqGet(tok, l(tok)-2, ";"))
    && neq(iClosing, l(tok)-2)) null;
  int i = 5, argStart = 5;
  new L<S> args;
  while (i < iClosing) {
    Int j = bracketMap.get(i);
    if (j != null) continue with i = j+2;
    if (eqGetOneOf(tok, i, ",")) {
      if (i > argStart) args.add(trimJoinSubList(tok, argStart, i));
      argStart = i+2;
    }
    i += 2;
  }
  if (i > argStart) args.add(trimJoinSubList(tok, argStart, i));
  ret pair(tok.get(1), args);
}