Descriptive Flexfields for Purchasing Documents REST Endpoints

Purchase Orders/Descriptive Flexfields for Purchasing Documents
The operations from the Purchase Orders/Descriptive Flexfields for Purchasing Documents category.
Get all descriptive flexfields
Method: get
Path: /fscmRestApi/resources/11.13.18.05/purchaseOrders/{purchaseOrdersUniqID}/child/DFF
Get one descriptive flexfield not supported
Method: get
Path: /fscmRestApi/resources/11.13.18.05/purchaseOrders/{purchaseOrdersUniqID}/child/DFF/{PoHeaderId}