code: static byte[] asciiCompatibleEncoding(byte[] asciiCompatName) {
          CaseInsensitiveBytesHash<TranscoderDB.Entry> dTable = TranscoderDB.transcoders.get(asciiCompatName);
          if (dTable == null || dTable.size() != 1) return null;
  
          byte[] asciiCN = null;
          for (Entry e : dTable) {
              if (!EConv.decorator(e.source, e.destination)) {
                  Transcoder transcoder = e.getTranscoder();
                  if (transcoder != null && transcoder.compatibility.isDecoder()) {
                      asciiCN = transcoder.destination;
                      break;
                  }
              }
          }
          return asciiCN;
      }
docs: ?? to transcoderdb ?