<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def triggers(self):
 """ Access the triggers :returns: twilio.rest.api.v2010.account.usage.trigger.TriggerList :rtype: twilio.rest.api.v2010.account.usage.trigger.TriggerList """

        if self._triggers is None:
            self._triggers = TriggerList(self._version, account_sid=self._solution['account_sid'], )
        return self._triggers