def api_retrieve(self, api_key=None, stripe_account=None):
        """
        Call the stripe API's retrieve operation for this model.
        :param api_key: The api key to use for this request. \
            Defaults to djstripe_settings.STRIPE_SECRET_KEY.
        :type api_key: string
        :param stripe_account: The optional connected account \
            for which this request is being made.
        :type stripe_account: string
        """
        nested_id = self.id
        id = self.transfer.id
        api_key = api_key or self.default_api_key

        # Prefer passed in stripe_account if set.
        if not stripe_account:
            stripe_account = self._get_stripe_account_id(api_key)

        return stripe.Transfer.retrieve_reversal(
            id=id,
            nested_id=nested_id,
            api_key=api_key,
            stripe_version=djstripe_settings.STRIPE_API_VERSION,
            expand=self.expand_fields,
            stripe_account=stripe_account,
        )

        Call the stripe API's retrieve operation for this model.
        :param api_key: The api key to use for this request.             Defaults to djstripe_settings.STRIPE_SECRET_KEY.
        :type api_key: string
        :param stripe_account: The optional connected account             for which this request is being made.
        :type stripe_account: string
        
djstripe/models/connect.py