PATCH/PUT requests work but not returning deserialized response body
This is because we call sendNoContentAsync instead of sendAsync()

Issue seems to be on metadata.
The request returns a 200 & response body - https://docs.microsoft.com/en-us/graph/api/message-update?view=graph-rest-1.0&tabs=http#response-1
But metadata reflects wrongly reflects that a 204 with no response body is expected...

Affects file uploads as well.
As of 2.0.0-RC9, PATCH requests return the deserialized response body
PUT request with discrepancy (Uploading to OneDrive) has been logged https://github.com/microsoft/OpenAPI.NET.OData/issues/310
Closed in last week's generation - https://github.com/microsoftgraph/msgraph-sdk-php/pull/1197