Events related to command verification.

        :type: List[:class:`.CommandHistoryEvent`]

def verification_events(self):
        """
        Events related to command verification.

        :type: List[:class:`.CommandHistoryEvent`]
        """
        queued = self._assemble_event('Verifier_Queued')
        started = self._assemble_event('Verifier_Started')
        return [x for x in [queued, started] if x]