ext js import statement

    import { define }     from 'extjs-kernel'; // module names not final
    import { Observable } from 'extjs-core';
 
    import { Base }       from 'app-some';
 
    @define({
        mixins: Observable,
        config: {
            value: null
        }
    })
    export default class Foo extends Base {
        updateValue (value, oldValue) {
            this.fireEvent('valuechange', value, oldValue);
        }
    }