import { mix, useReactiveBinding, BoltElement } from 'c/bolt';
export default class myLwc extends mix( [useReactiveBinding], BoltElement) { }
void
export default class myLwc extends mix( [useReactiveBinding], BoltElement) { @track value = 'foo';}
<lightning-input data-bind="value" value={value} onchange={bind}></lightning-input>