code: static <T1> Flowable<Notification<T1>> createWithOneOutParameter(Single<Connection> connection, String sql,
              Flowable<List<Object>> parameterGroups, List<ParameterPlaceholder> parameterPlaceholders, Class<T1> cls) {
          return connection.toFlowable()
                  .flatMap(con -> createWithParameters(con, sql, parameterGroups, parameterPlaceholders,
                          (stmt, parameters) -> createWithOneParameter(stmt, parameters, parameterPlaceholders, cls)));
      }
docs: ///////////////////////