code: def get_rtc_table(self):
          
          rtc_table = self._global_tables.get(RF_RTC_UC)
          # Lazy initialization of the table.
          if not rtc_table:
              rtc_table = RtcTable(self._core_service, self._signal_bus)
              self._global_tables[RF_RTC_UC] = rtc_table
              self._tables[(None, RF_RTC_UC)] = rtc_table
          return rtc_table
docs: Returns global RTC table.
  
          Creates the table if it does not exist.