Validate that the session was started for this agent (marker file exists in agent's history dir for current sessionId). Caller must set sessionId on the agent (agent.setSessionId) before calling. Throws SfError if the session marker is not found.
Validate that the session was started for this agent (marker file exists in agent's history dir for current sessionId). Caller must set sessionId on the agent (agent.setSessionId) before calling. Throws SfError if the session marker is not found.