class_docstr: Base class for all BackgroundFiller
class_docstr_tok: ["Base","class","for","all","BackgroundFiller"]
code: def _fill(self, background_shape, img):
      pass
  
imports: import numpy
  from abc import abstractmethod
  from .base import ImageAugmentor
  from .transform import TransformFactory
label_desc: Use image node_id 2 for calling the BackgroundFiller obj's underlying member method code with example usage: obj._fill(background_shape, img) without return types