// returns index of "{" or ";"
static int tok_findEndOfMethodHeader(LS tok, int i) {
  i |= 1;
  int level = 0;
  while (i < l(tok)) {
    S t = tok.get(i);
    if (eq(t, "(")) ++level;
    else if (eq(t, ")")) --level;
    else if (level == 0 && eqOneOf(t, "{", ";")) ret i;
    i += 2;
  }
  ret i;
}