Define a base class
---
```js
odoo.define('web.test.A', function (require) {
    const makePatchable = require('web.class_patcher');
    class A {
        constructor() {
            console.log('A');
            this.x = ['A'];
        }
        do() {
            console.log('A.do', this.x);
        }
    }
    return makePatchable(A); // return a "patchable" version of the class
});
```
OOP inheritance
---
```js
odoo.define('web.test.B', function (require) {
    const makePatchable = require('web.class_patcher');
    const A = require('web.test.A');
    class B extends A {
        constructor() {
            super(...arguments);
            console.log('B');
            this.x.push('B');
        }
        do() {
            super.do();
            console.log('B.do');
        }
    }
    return makePatchable(B);
});
```
Patch
---
```js
odoo.define('web.test.A.patch_1', function (require) {
    const A = require('web.test.A');
    A.patch('p1', T => class extends T {
        constructor() {
            super(...arguments);
            console.log('A<1>');
            this.x.push('A<1>');
        }
        do() {
            super.do();
            console.log('A<1>.do');
        }
    });
});
```
Use
---
```js
odoo.define('web.test.live', function (require) {
    const A = require('web.test.A');
    const B = require('web.test.B');
    
    const o = new B(); // will log: "A A<1> B"
    o.do();
    // will log:
    // A.do A A<1> B    <-- this is the order of constructor calls
    // A<1>.do
    // B.do

    // We can also unpatch
    A.unpatch('p1');
});
```