static Map<S, LS> lcEncodingsAsStringLists(LineCompCompressor lc) {
  ret mapValues(lc.finalEncodings, l -> map(l, i -> lc.itemToString(i)));
}

ifclass LCLongerProds
static Map<S, LS> lcEncodingsAsStringLists(LCLongerProds lc) {
  ret mapValues(lc.files, l -> map(l, i -> lc.itemToString(i)));
}
endif