Project Costing Flexfields for Requisition Preferences REST Endpoints

Requisition Preferences/Project Costing Flexfields for Requisition Preferences
The Project Costing Flexfields resource gets the projects details for the user's requisition preferences.
Create one project costing flexfield
Method: post
Path: /fscmRestApi/resources/11.13.18.05/requisitionPreferences/{requisitionPreferencesUniqID}/child/projectDFF
Get action, not supported
Method: get
Path: /fscmRestApi/resources/11.13.18.05/requisitionPreferences/{requisitionPreferencesUniqID}/child/projectDFF/{UserPreferenceId}
Get all project costing flexfields
Method: get
Path: /fscmRestApi/resources/11.13.18.05/requisitionPreferences/{requisitionPreferencesUniqID}/child/projectDFF
Update one project costing flexfield
Method: patch
Path: /fscmRestApi/resources/11.13.18.05/requisitionPreferences/{requisitionPreferencesUniqID}/child/projectDFF/{UserPreferenceId}