function updateNativeElement (entityId, newEl) {
    var target = entities[entityId]
    if (target.ownerId === 'root') return
    if (children[target.ownerId]['0'] === entityId) {
      entities[target.ownerId].nativeElement = newEl
      updateNativeElement(target.ownerId, newEl)
    }
  }
Update all entities in a branch that have the same nativeElement. This
happens when a component has another component as it's root node.

@param {String} entityId
@param {HTMLElement} newEl

@return {void}