code: public Converter getExternalConverter(String id) {
          for (ExternalConverters ec : getExternalConverters()) {
              for (ConverterWrapper cw : ec.getConverters()) {
                  if (cw.getId().equals(id)) {
                      return cw.getConverter();
                  }
              }
          }
          return null;
      }
docs: Search external converter by id