class_docstr: This class stores additional information on backbones.
      
docstr: Returns a retinanet model using the correct backbone.
          
docstr_tok: ["Returns","a","retinanet","model","using","the","correct","backbone","."]
code: def retinanet(self, *args, **kwargs):
      """Returns a retinanet model using the correct backbone."""
      raise NotImplementedError("retinanet method not implemented.")
  
file_path: ImageAI/imageai_tf_deprecated/Detection/keras_retinanet/models/__init__.py
imports: from __future__ import print_function
  import sys
label_desc: Use image node_id 2 for calling the Backbone obj's underlying member method code with example usage: obj.retinanet() without return types