code: def fitted(self):
      return True
  
file_path: snips-nlu/snips_nlu/tests/test_processing_unit.py
imports: from snips_nlu.pipeline.processing_unit import ProcessingUnit
  from snips_nlu.tests.utils import FixtureTest
label_desc: Use image node_id 3 for calling the DummyProcessingUnit obj's underlying member method code with example usage: obj.fitted() and returns: True