// returns actual CNC
static L<IntRange> tok_findImports_returnRanges(LS tok) {
  new L<IntRange> imports;
  int n = l(tok);
  for (int i : indicesOf(tok, "import")) {
    int j = indexOf(tok, ";", i+2);
    if (j < 0) break;
    imports.add(intRange(i-1, j+2));
    i = j;
  }
  ret imports;
}