@reference_id.setter<EOL><INDENT>def reference_id(self, reference_id):<DEDENT>
self._reference_id = reference_id<EOL>
Sets the reference_id of this InventoryTransfer.
An optional ID provided by the application to tie the [InventoryTransfer](#type-inventorytransfer) to an external system.

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