Can someone explain why fields_view_get is not being triggered ? Even in debug. I'm using v9

class AdjustmentLines(models.Model):
    
    _name = 'load.valuation.adjustment.lines'    
    _description = 'Stock Valuation Adjustment Lines'
    
    name = fields.Char('Description', compute='_compute_name', store=True)    
    cost_id = fields.Many2one('load.load', 'Landed Cost', ondelete='cascade', required=True)
    cost_line_id = fields.Many2one('load.landed.cost.lines', 'Cost Line', readonly=True)    
    move_id = fields.Many2one('stock.move', 'Stock Move', readonly=True)    
    product_id = fields.Many2one('product.product', 'Product', required=True)    
    quantity = fields.Float('Quantity', default=1.0, digits=dp.get_precision('Product Unit of Measure'), required=True)    
    weight = fields.Float('Weight', default=1.0, digits=dp.get_precision('Product Unit of Measure'))    
    test = fields.Char(string='Test', default='aaa')    
    volume = fields.Float('Volume', default=1.0, digits=dp.get_precision('Product Unit of Measure'))    
    former_cost = fields.Float('Former Cost', digits=dp.get_precision('Product Price'))    
    former_cost_per_unit = fields.Float('Former Cost(Per Unit)', compute='_compute_former_cost_per_unit', digits=0, store=True)    
    additional_landed_cost = fields.Float('Additional Landed Cost', digits=dp.get_precision('Product Price'))    
    final_cost = fields.Float('Final Cost', compute='_compute_final_cost', digits=0, store=True)        
 
    def fields_view_get(self, cr, uid, view_id=None, view_type='form', context=None, toolbar=False, submenu=False):
         
        #override of fields_view_get in order to replace the name field to product template         
        if context is None:
             
            context={}         
            res = super(AdjustmentLines, self).fields_view_get(cr, uid, view_id=view_id, view_type=view_type, context=context, toolbar=toolbar, submenu=submenu)
       (...)