docstr: Args:
      inputs: [2, C, H, W]
docstr_tok: ["Args",":","inputs",":","[","2",",","C",",","H",",","W","]"]
code: def graph_structure(self, inputs):
      """
      Args:
          inputs: [2, C, H, W]
      """
      raise NotImplementedError()
  
imports: import tensorflow
  from tensorpack import ModelDesc, argscope, enable_argscope_for_module
label_desc: Use image node_id 3 for calling the FlowNetBase obj's underlying member method code with example usage: obj.graph_structure(inputs) without return types