code: def test_filler(self):
      filler = Filler(0.0, 0.0, 0.1, 0.2)
      self.transformer_test(filler)
  
imports: import pytest
  import os
  from bigdl.dllib.utils.common import *
  from bigdl.dllib.feature.transform.vision.image import *
  import tempfile
label_desc: Use image node_id 25 for calling the TestLayer obj's underlying member method code with example usage: obj.test_filler() without return types