Hello, 

I would like to know if it's possible or not to call a odoo studio field in a model like this ?

class sale_order(models.Model):
    _inherit = "sale.order"
        
     @api.onchange('x_studio_first_field')
    def _onchange_firstfield(self):
        if self.x_studio_first_field:
            self.x_studio_second_field = self.x_studio_first_field