class A(models.Model):
     area = fields.Float( compute = "_compute_area" , string = "Area" , track_visibility = 'onchange' , digits =( 12 , 7 )) 
     price_Pc = fields.Float( compute = "_compute_price_Pc " , string = "Price/Pc" , track_visibility = 'onchange' , digits =( 12 , 10 ))    
     rate_SqM = fields.Float(     compute ="_compute_rate_SqM" , string = "Rate/SqM" , track_visibility = 'onchange' , digits =( 12 , 2 ))    
     gsm = fields. Float( required = True , string = "GSM" , track_visibility = 'onchange' )   
     rate_Kg = fields.Float( required = True , string = "Rate/Kg" , track_visibility = 'onchange' )
     coverage = fields. Float( default = 100.0 , required = True , string = "Coverage" , track_visibility = 'onchange' )
    @api.depends('?????????')
    def _compute_area(self):
                pass
class B(models.Model):
       a = field.many2many(comodel_name="module.A")
        deck = fields.float()



question is how can i access "deck" value inside model A's depends() ?