code: def setUpClass(cls):
      super(BatchPandasUDAFITTests, cls).setUpClass()
      cls.t_env.create_temporary_system_function(
          "max_add",
          udaf(
              MaxAdd(), result_type=DataTypes.INT(), func_type="pandas"
          ),
      )
      cls.t_env.create_temporary_system_function("mean_udaf", mean_udaf)
  
imports: import uuid
  from pyflink.table.expressions import col, call, lit, row_interval
  from pyflink.table.types import DataTypes
  from pyflink.table.udf import udaf, udf, AggregateFunction
  from pyflink.testing import source_sink_utils
  from pyflink.testing.test_case_utils import PyFlinkBatchTableTestCase, PyFlinkStreamTableTestCase
label_desc: Use image node_id 1 for calling the BatchPandasUDAFITTests obj's underlying member method code with example usage: obj.setUpClass(cls) without return types