docs: public static String getJavaCharset(final int id) {
          Entry entry = getEntry(id);
  
          if (entry != null) {
              if (entry.javaCharset != null) {
                  return entry.javaCharset;
              } else {
                  logger.warn("Unknown java charset for: id = " + id + ", name = " + entry.mysqlCharset + ", coll = "
                              + entry.mysqlCollation);
                  return null;
              }
          } else {
              logger.warn("Unexpect mysql charset: " + id);
              return null;
          }
      }