rewindAsync
Rewinds the session to before the specified invocation.
Appends a synthetic user-authored event with reversing stateDelta and artifactDelta entries that restore session state and artifacts to what they were at the start of rewindBeforeInvocationId. State and artifact keys prefixed with app: and user: are preserved (they outlive the rewound invocation). Mirrors Python ADK runners.py:rewind_async.
The default implementation throws NotImplementedError for temporary backward compatibility with existing Runner implementations; override to support session rewind.
Parameters
userId
The user ID of the session.
sessionId
The session ID of the session.
rewindBeforeInvocationId
The invocation to rewind before.
Throws
IllegalArgumentException
if no event in the session has the given invocation id.