When I override a class for example the Spinnerfield I insert this

Ext.define('my.Spinner', {
Ext.define('iBone.field.Spinner', {
    override: 'Ext.field.Spinner',
and I put the functions that I want override, for example applyValue, but inside this method I put
and it go to the function applyValue of the Ext.field.Spinner and then to the applyValue of the Ext.field.Number, when I want that it go directly to the second option. Because it's supposed I'm overriding this fucntion and the same in the Ext.field.Spinner would cease to exist.

Am I doing something wrong??

Sorry for my English, thanks