code: def test_map_transformation():
      tran = transform.VstackFeatures(
          output_field="dynamic_feat",
          input_fields=["age", "time_feat"],
          drop_inputs=True,
      )
  
      assert equals(tran, clone(tran))
      assert not equals(tran, clone(tran, {"drop_inputs": False}))
  
file_path: gluonts/test/mx/test_transform_equals.py
imports: from gluonts.core.serde.flat import clone
  from gluonts import time_feature, transform
  from gluonts.core.component import equals
  from gluonts.dataset.field_names import FieldName
  from gluonts.mx import CanonicalRNNEstimator
  from pandas.tseries.frequencies import to_offset
label_desc: Use image node_id 1 for calling a global function with example usage: test_map_transformation() without return types