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

def check_format(self, sm_format):
        """
        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
        """
        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