Accessing the ONNX params

Hi @tqchen I am using the old NNVM graph interface to invoke the compilation: with nnvm.compiler.build_config(opt_level=opt_level): graph, lib, params = nnvm.compiler.build(sym, target, shape_dict, dtype=dtype_dict, params=params)

Is there any way to access the raw weights, bias etc for Conv2D like I access the params as in: const Conv2DParam& param = nnvm::get(inode.source->attrs.parsed);

Can you please help.!?