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