test

    @api.model
    def get_freight_matrix_supplier_ids(self):
        freight_matrix_ids = supplier_ids = []

        active_model = self.env.context.get('active_model')
        active_ids = self.env.context.get('active_ids', [])

        if active_model == 'jiti.freight.matrix':
            freight_matrix_ids = self.env['jiti.freight.matrix'].browse(active_ids)

        else:
            supplier_ids = self.env['res.partner'].browse(active_ids)
            for supplier_id in supplier_ids:
                if not supplier_id.supplier:
                    raise ValidationError(_('The carrier \'{}\' should be a supplier.').format(supplier_id.name))
                if not supplier_id.provides_landed_cost:
                    raise ValidationError(
                        _('The carrier \'{}\' should be defined as provides landed cost.'.format(supplier_id.name)))
                freight_matrix_ids = self.env['jiti.freight.matrix'].search([('carrier_id', '=', supplier_id.id)])
        return freight_matrix_ids, supplier_ids