code: def test_is_checkpointing_enabled(self):
      self.assertFalse(
          self.checkpoint_config.is_checkpointing_enabled()
      )
  
      self.env.enable_checkpointing(1000)
  
      self.assertTrue(self.checkpoint_config.is_checkpointing_enabled())
  
file_path: flink/flink-python/pyflink/datastream/tests/test_check_point_config.py
imports: from pyflink.common import Duration
  from pyflink.datastream import CheckpointConfig, CheckpointingMode, ExternalizedCheckpointCleanup, StreamExecutionEnvironment
  from pyflink.java_gateway import get_gateway
  from pyflink.testing.test_case_utils import PyFlinkTestCase
label_desc: Use image node_id 3 for calling the CheckpointConfigTests obj's underlying member method code with example usage: obj.test_is_checkpointing_enabled() without return types