code: def test_disable_enable_force_kryo(self):
      self.execution_config.disable_force_kryo()
  
      self.assertFalse(self.execution_config.is_force_kryo_enabled())
  
      self.execution_config.enable_force_kryo()
  
      self.assertTrue(self.execution_config.is_force_kryo_enabled())
  
imports: from pyflink.datastream import StreamExecutionEnvironment
  from pyflink.common import ExecutionConfig, RestartStrategies, ExecutionMode, Configuration
  from pyflink.java_gateway import get_gateway
  from pyflink.testing.test_case_utils import PyFlinkTestCase
  from pyflink.util.java_utils import get_j_env_configuration
label_desc: Use image node_id 11 for calling the ExecutionConfigTests obj's underlying member method code with example usage: obj.test_disable_enable_force_kryo() without return types