code: def check_format(self, sm_format):
          
          if sm_format not in SyncMapFormat.ALLOWED_VALUES:
              self.print_error(u"Sync map format '%s' is not allowed" % (sm_format))
              self.print_info(u"Allowed formats:")
              self.print_generic(u" ".join(SyncMapFormat.ALLOWED_VALUES))
              return False
          return True
docs: Return ``True`` if the given sync map format is allowed,
          and ``False`` otherwise.
  
          :param sm_format: the sync map format to be checked
          :type  sm_format: Unicode string
          :rtype: bool