class_docstr: Mocks Faster RCNN Network
code: def get_base_network_checkpoint_vars(self):
      return None
  
imports: import sonnet
  import tempfile
  import tensorflow
  from easydict import EasyDict
  from luminoth.train import run
  from luminoth.models import get_model
  from luminoth.utils.config import get_model_config, load_config_files, get_base_config
label_desc: Use image node_id 5 for calling the MockFasterRCNN obj's underlying member method code with example usage: obj.get_base_network_checkpoint_vars() and returns: None