code: def managed_dependencies(self):
      
      if self.payload.managed_dependencies:
        address = Address.parse(self.payload.managed_dependencies,
                                relative_to=self.address.spec_path)
        self._build_graph.inject_address_closure(address)
        return self._build_graph.get_target(address)
      return None
docs: The managed_jar_dependencies target this jar_library specifies, or None.
  
      :API: public