code: def _AppendNets(nets_or_steps, *nets):
      nets_or_steps = _MakeList((nets_or_steps,))
      nets = _MakeList(nets)
      if _IsNets(nets_or_steps):
          return nets_or_steps + nets
      else:
          return nets_or_steps + [Do("append", nets)]
  
imports: from caffe2.python import core
label_desc: Use image node_id 5 for calling a global function with example usage: _AppendNets(nets_or_steps) and returns: unknown, unknown