code: def fragments(self):
      frags = []
      for child in self.children:
          frags += child.fragments
      return frags
  
imports: import numpy
  import tensorflow
  import lucid.modelzoo.vision_models
  import lucid.optvis.objectives
  import lucid.optvis.param
  import lucid.optvis.render
  from lucid.misc.io import show, load
  from lucid.misc.io.showing import _image_url, _display_html
  from collections import defaultdict
  from lucid.scratch.pretty_graphs.graph import *
label_desc: Use image node_id 4 for calling the FragmentContainer obj's underlying member method code with example usage: obj.fragments() and returns: frags