Is it possible to call the method localhost:8069/web/export/xls with multiple models? Currently the POST data is passed in a JSON string this way: data:{"model":"stock.picking.in","fields":[{"name":"id","label":"External ID"},{"name":"min_date","label":"Date"}],"ids":[16,15,14,13,12,11,7,6,5,3],"domain":[["type","=","in"]],"import_compat":true}

stock.picking.in and stock.production.lot have both an external id to product.product called product_id.