I tried to use "track_visibility" for some fields in models.py 

here is my model

class Category(models.Model):
    _name = 'costing.category'

    _inherit = ['portal.mixin', 'mail.thread', 'mail.activity.mixin']
    description = fields.Text(string="Description")
    display_name = fields.Char(string="Display Name", required=True)
    is_active = fields.Boolean(string="Is Active", default=True)    
    name = fields.Char(string="Name", required=True, track_visibility='onchange') 

but when I tried to install it shows too many fields in the form view itself while I have only five fields

t
I checked in debug mode for form view it showing empty