@property<EOL><INDENT>def purchase_order_id(self):<DEDENT>
return self._purchase_order_id<EOL>
Gets the purchase_order_id of this InventoryAdjustment.
The read-only Square ID of the purchase order that caused the adjustment. Only relevant for state transitions from the Square for Retail app.

:return: The purchase_order_id of this InventoryAdjustment.
:rtype: str