Method constructor

packages/dnd-core/src/DragDropManager.js:7–16

(createBackend, context = {})

export default class DragDropManager {
  constructor(createBackend, context = {}) {
    const store = createStore(reducer);
    this.context = context;
    this.store = store;
    this.monitor = new DragDropMonitor(store);
    this.registry = this.monitor.registry;
    this.backend = createBackend(this);

    store.subscribe(this.handleRefCountChange.bind(this));
  }

  handleRefCountChange() {
    const shouldSetUp = this.store.getState().refCount > 0;