update(updates = {}) {
    this.store.subscribe(() => {
      const [data, changedKey] = this.store.getState();
      const callback = updates[changedKey];

      if (callback) callback(data[changedKey]);
    });
  }
@method update
@description Load updates from object.
@param {Object} updates Updates data
@memberof module:modules/app.StateModule
@example <caption> Update callback for `sphereColor`</caption>
state.update({
  sphereColor: color => sphere.material.color.setHex(color)
});