This sample code submits a GET request to an external data service. The service then returns the supported object types, which includes the classes, workflow information, or item types for whose properties are to be updated with the values that are obtained from the external data source.
GET /types?repositoryId=Repository_ID
[
{"SymbolicName": "Book"},
{"SymbolicName": "Invoice"},
{"SymbolicName": "Folder"}
{"SymbolicName": "Document"}
]