private static String baToString(byte[] ba, int len) {
    if (ba == null) {
      return "null";
    }
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < len; i++) {
      sb.append(ba[i]).append(", ");
    }
    return sb.toString();
  }
Method to be used only for testing

@param ch Object to replace the channel in the Oplog.crf
@return original channel object
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java