Purchasing Document Header Changes REST Endpoints

Purchasing Document Changes/Purchasing Document Header Changes
Management of changes to purchase order header on an approved version for comparison.
Get all header changes
Method: get
Path: /fscmRestApi/resources/11.13.18.05/purchasingDocumentChanges/{VersionId}/child/compareHeaders
Get one header changes
Method: get
Path: /fscmRestApi/resources/11.13.18.05/purchasingDocumentChanges/{VersionId}/child/compareHeaders/{VersionId3}