code: def transformFromNative(cls, obj):
          
          if obj.isNative:
              obj.isNative = False
              transformed = []
              for tup in obj.value:
                  transformed.append(periodToString(tup, cls.forceUTC))
              if len(transformed) > 0:
                  tzid = TimezoneComponent.registerTzinfo(tup[0].tzinfo)
                  if not cls.forceUTC and tzid is not None:
                      obj.tzid_param = tzid
  
              obj.value = ','.join(transformed)
  
          return obj
docs: Convert the list of tuples in obj.value to strings.