protected void addDatasources(DatasourcesFraction fraction, List<ModelNode> list) {
   for (Datasource each : fraction.datasources()) {
     addDatasource(each, list);
   }
 }
 protected void addDrivers(DatasourcesFraction fraction, List<ModelNode> list) {
   for (Driver each : fraction.drivers()) {
     addDriver(each, list);
   }
 }