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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _build_stack(self):
 """ Construct a list of dictionaries representing the connection configuration between the controller and the target. This is additionally used by the integration tests "mitogen_get_stack" action to fetch the would-be connection configuration. """

        return self._stack_from_spec(
            ansible_mitogen.transport_config.PlayContextSpec(
                connection=self,
                play_context=self._play_context,
                transport=self.transport,
                inventory_name=self.inventory_hostname,
            )
        )