How to use the @cycle/isolate.default function in @cycle/isolate

function main (sources) {
      const child = isolate(Child)(sources)
      // make child.DOM be inserted, removed, and inserted again
      const innerDOM$ = Observable.interval(50).take(3)
        .map(x => x === 1 ? Observable.of(div()) : child.DOM).switch()
      return {
        DOM: innerDOM$
      }
    }

function main (sources) {
      const first = isolate(Child, 'first')(sources)
      first.DOM = first.DOM.share()
      const second = isolate(Child, 'second')(sources)
      second.DOM = second.DOM.share()
      const oneChild = [first]
      const twoChildren = [first, second]
      const vnode$ = Observable.interval(50).skip(1).take(1).startWith(-1)
        .map(i => i === -1 ? oneChild : twoChildren)
        .map(children =>
          Observable.combineLatest(
            ...children.map(child => child.DOM),
            (...childVNodes) => div('.parent', childVNodes)
          )
        ).switch()
      return {
        DOM: vnode$
      }

function main (sources) {
      const first = isolate(Child, 'first')(sources)
      first.DOM = first.DOM.share()
      const second = isolate(Child, 'second')(sources)
      second.DOM = second.DOM.share()
      const oneChild = [first]
      const twoChildren = [first, second]
      const vnode$ = Observable.interval(50).skip(1).take(1).startWith(-1)
        .map(i => i === -1 ? oneChild : twoChildren)
        .map(children =>
          Observable.combineLatest(
            ...children.map(child => child.DOM),
            (...childVNodes) => div('.parent', childVNodes)
          )
        ).switch()
      return {
        DOM: vnode$
      }
    }

var toIsolate = ramda_1.curryN(3, function (update, sources, _a) {
    var plugin = _a.plugin, props = _a.props;
    return isolate_1.default(plugin.component)(ramda_1.merge({ props: props }, sources), update);
});
var isolatePlugin = ramda_1.curryN(4, function (update, sources, query, plugin) { return toIsolate(update, sources, toProps(query, plugin)); });