code: def schedule(self):
      return ts.TaskSchedulerResult(
          output=ts.ExecutorNodeOutput(
              executor_output=execution_result_pb2.ExecutorOutput()
          )
      )
  
imports: from absl.testing.absltest import mock
  import tensorflow
  from tfx.orchestration import metadata
  from tfx.orchestration.experimental.core import constants
  from tfx.orchestration.experimental.core import task
  from tfx.orchestration.experimental.core import task_scheduler
  from tfx.orchestration.experimental.core import test_utils
  from tfx.proto.orchestration import execution_result_pb2
  from tfx.proto.orchestration import pipeline_pb2
  from tfx.utils import test_case_utils
label_desc: Use image node_id 1 for calling the _FakeTaskScheduler obj's underlying member method code with example usage: obj.schedule() and returns: ts