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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _unschedule_sending_init_updates(self):
 """Un-schedules sending of initial updates Stops the timer if set for sending initial updates. Returns: - True if timer was stopped - False if timer was already stopped and nothing was done """

        LOG.debug('Un-scheduling sending of initial Non-RTC UPDATEs'
                  ' (init. UPDATEs already sent: %s)',
                  self._sent_init_non_rtc_update)
        if self._rtc_eor_timer:
            self._rtc_eor_timer.stop()
            self._rtc_eor_timer = None
            return True
        return False