Setter for **self.__default_pixmap** attribute.

        :param value: Attribute value.
        :type value: QPixmap

def default_pixmap(self, value):
        """
        Setter for **self.__default_pixmap** attribute.

        :param value: Attribute value.
        :type value: QPixmap
        """

        if value is not None:
            assert type(value) is QPixmap, "'{0}' attribute: '{1}' type is not 'QPixmap'!".format(
                "default_pixmap", value)
        self.__default_pixmap = value