code: @Override
      public String getJvmConverter(String encoding) {
          if (null != encoding) {
              String converter = this.converterMap.get(encoding.toLowerCase());
              if (null != converter) {
                  return converter;
              }
          }
          return encoding;
      }
docs: /*
  @see com.ibm.websphere.http.EncodingUtils#getJvmConverter(java.lang.String)