new_contents: from flow_workflow import adapter_base
  from flow_workflow.pass_through import future_nets
  
  
  class PassThroughAdapter(adapter_base.AdapterBase):
      def __init__(self, name, operation_class, *args, **kwargs):
          adapter_base.AdapterBase.__init__(self, *args, **kwargs)
  
          self._name = name
          self._operation_class = operation_class
  
      @property
      def name(self):
          return self._name
  
      @property
      def operation_class(self):
          return self._operation_class
  
      def future_net(self, input_connections, output_properties, resources):
          return future_nets.PassThroughNet(name=self.name,
                  input_connections=input_connections,
                  operation_id=self.operation_id)
  
subject: add missing pass_through/adapters.py