code: def construct_for(self, service_name):
          
          # Construct a new ``ConnectionDetails`` (or similar class) for storing
          # the relevant details about the service & its operations.
          details = self.details_class(service_name, self.session)
          # Make sure the new class gets that ``ConnectionDetails`` instance as a
          # ``cls._details`` attribute.
          attrs = {
              '_details': details,
          }
  
          # Determine what we should call it.
          klass_name = self._build_class_name(service_name)
  
          # Construct what the class ought to have on it.
          attrs.update(self._build_methods(details))
  
          # Create the class.
          return type(
              klass_name,
              (self.base_connection,),
              attrs
          )
docs: Builds a new, specialized ``Connection`` subclass for a given service.
  
          This will introspect a service, determine all the API calls it has &
          constructs a brand new class with those methods on it.
  
          :param service_name: The name of the service to construct a connection
              for. Ex. ``sqs``, ``sns``, ``dynamodb``, etc.
          :type service_name: string
  
          :returns: A new connection class for that service