Push notifications in a2a example

[victorinect]

Hi, I'm looking for a good a2a client-server example thats not deprecated with push notifications but cant find it in the samples.
Good someone give a good reference thats online? I mainly code in python

[MG1-4]

We are also looking to implement our a2a agents with push notifications and have some queries around this:
the spec says

"Notification Payload: The A2A protocol itself does not strictly define the HTTP body payload of the push notification sent by the server to the client's webhook. However, the notification SHOULD contain sufficient information for the client to identify the Task ID and understand the general nature of the update (e.g., the new TaskState). Servers might send a minimal payload (just Task ID and new state) or a more comprehensive one (e.g., a summary or even the full Task object)"

However, in the examples, there is no task id mentioned explicitly. What possible scenarios can this happen in.. more detailed examples around this will be helpful.

Server acknowledges the task (e.g., status submitted or working):

{
"jsonrpc": "2.0",
"id": "req-005",
"result": {
"id": "43667960-d455-4453-b0cf-1bae4955270d",
"contextId": "c295ea44-7543-4f78-b524-7a38915ad6e4",
"status": { "state": "submitted", "timestamp": "2024-03-15T11:00:00Z" }
// ... other fields ...
}
}