<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _defineEditedCallbackObjectFor(self, parScope, parName):
 """ Override to allow us to use an edited callback. """


        # We know that the _taskParsObj is a ConfigObjPars
        triggerStrs = self._taskParsObj.getTriggerStrings(parScope, parName)

        # Some items will have a trigger, but likely most won't
        if triggerStrs and len(triggerStrs) > 0:
            return self
        else:
            return None