code: def foo(self):
      a = A(**self.a_param.asdict())
      return a()
  
imports: import abc
  import os
  import unittest
  from reagent.core.configuration import make_config_class, resolve_defaults
  from reagent.core.dataclasses import dataclass, field
  from reagent.core.registry_meta import RegistryMeta
  from reagent.core.tagged_union import TaggedUnion
label_desc: Use image node_id 1 for calling the Foo obj's underlying member method code with example usage: obj.foo() and returns: a