def is_all_field_none(self):
        """
        :rtype: bool
        """

        if self._time_start is not None:
            return False

        if self._time_end is not None:
            return False

        if self._recurrence_unit is not None:
            return False

        if self._recurrence_size is not None:
            return False

        if self._status is not None:
            return False

        if self._object_ is not None:
            return False

        return True
def is_all_field_none ( self ) : if self . _time_start is not None : return False if self . _time_end is not None : return False if self . _recurrence_unit is not None : return False if self . _recurrence_size is not None : return False if self . _status is not None : return False if self . _object_ is not None : return False return True
:rtype: bool