@reference_id.setter<EOL><INDENT>def reference_id(self, reference_id):<DEDENT>
self._reference_id = reference_id<EOL>
Sets the reference_id of this Transaction.
If the transaction was created with the [Charge](#endpoint-transactions-charge) endpoint, this value is the same as the value provided for the `reference_id` parameter in the request to that endpoint. Otherwise, it is not set.

:param reference_id: The reference_id of this Transaction.
:type: str