Hello odooers

In version 8,  we find _track field directly like fields = self.env[model]._track
but in v13 how can I find these fields??

in v8 sale order:
_track = {
       'state': {
           'sale.mt_order_confirmed': lambda self, cr, uid, obj, ctx=None: obj.state in ['manual', 'progress'],
           'sale.mt_order_sent': lambda self, cr, uid, obj, ctx=None: obj.state in ['sent']
       },
   }