def get_value_info_proto(self, value_info_name: str) -> Optional[ValueInfoProto]:
        """Get the value info proto.

        :param value_info_name: name of the value info.
        :return: ValueInfoProto object.
        """
        assert value_info_name in self.ios, f"{value_info_name} is not a value info."
        return self.ios[value_info_name].proto[0] if self.ios[value_info_name].proto else None
Get the value info proto.

        :param value_info_name: name of the value info.
        :return: ValueInfoProto object.
        
olive/passes/onnx/onnx_dag.py