ReaderRevenueSubscriptionLinking: Unexpected POST Request Instead of PATCH When Calling `UpdateEntitlements`

[yccmta]

When instantiating SubscribewithGoogle using com.google.api.client.http.javanet.NetHttpTransport, and calling the UpdateEntitlements method from the Reader Revenue Subscription Linking API (v1), a POST request is sent instead of the expected PATCH request.

Reference:
UpdateEntitlements method source

google-api-java-client-services/clients/google-api-services-readerrevenuesubscriptionlinking/v1/2.0.0/com/google/api/services/readerrevenuesubscriptionlinking/v1/SubscriptionLinking.java

Line 649 in 700b41f

public UpdateEntitlements updateEntitlements(java.lang.String name, com.google.api.services.readerrevenuesubscriptionlinking.v1.model.ReaderEntitlements content) throws java.io.IOException {

Environment details

1. OS Type and Version
   Windows 11 (64-bit)

2. Java Version
   1.8.0_60
   Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
   Java HotSpot(TM) Client VM (build 25.60-b23, mixed mode)

3. Library Versions

implementation 'com.google.api-client:google-api-client:2.6.0'
implementation 'com.google.auth:google-auth-library-oauth2-http:1.23.0'
implementation 'com.google.apis:google-api-services-androidpublisher:v3-rev20240709-2.0.0'
implementation 'com.google.apis:google-api-services-readerrevenuesubscriptionlinking:v1-rev20250611-2.0.0'
implementation 'org.apache.httpcomponents:httpclient:4.5.13'

4. Build Tools

• Gradle 7.0.2
• Apache Ant(TM) version 1.10.9
• JVM: 1.8.0_60 (Oracle Corporation 25.60-b23)

Steps to reproduce

1. Instantiate SubscribewithGoogle using com.google.api.client.http.javanet.NetHttpTransport.
2. Call the UpdateEntitlements method from the Reader Revenue Subscription Linking API v1.

Any additional information below

Additionally, although deprecated, we confirmed that using an instance of com.google.api.client.http.apache.ApacheHttpTransport results in a PATCH request being sent as expected.