Close Greengrass IPC Pub/Sub Subscription with C++ SDK

Hello,

I am trying to implement a Request / Response communication pattern on top of Greengrass IPC's Pub/Sub API. The basic design is as follows:

• The client process generates a unique ID for its request
• The client process subscribes to a specific topic dedicated to responding to the request, such as ipc/upload/response/<request ID generated in step 1>
• The client process makes a request to the server process at a specific topic, such as ipc/upload/request
• The server process processes the request and publishes the response on the response topic
• The client process reads the response on the response topic and unsubscribes / cleans up the response handler

I want to do the unsubscribe and clean up as there may be many requests and it does not seem to leave a number of handlers allocated after they have handled the single message they are intended to. However, I am not seeing anything in the GreengrassCoreIpcClient API docs about how to unsubscribe from a local pub/sub topic. How should I go about this?