ext js import statement

1    import { define }     from 'extjs-kernel'; // module names not final
2    import { Observable } from 'extjs-core';
3 
4    import { Base }       from 'app-some';
5 
6    @define({
7        mixins: Observable,
8        config: {
9            value: null
10        }
11    })
12    export default class Foo extends Base {
13        updateValue (value, oldValue) {
14            this.fireEvent('valuechange', value, oldValue);
15        }
16    }