In every case where setResponse is called, notify was called soon after. In one case immediately, in another, after intervening functions which are safe to reorder after notifications.
The null-check of response is safe to eliminate because response must not be null inside setResponse.
There is no need for the timer to be created only under certain conditions. Stopping a non-started timer is a no-op. Therefore it can simply be a direct member.
While here, rename the variable. It's a timer, not a request.
