setTarget(target) {
    this.set(MapProperty.TARGET, target);
  }
Set the target element to render this map into.
For accessibility (focus and keyboard events for map navigation), the `target` element must have a
 properly configured `tabindex` attribute. If the `target` element is inside a Shadow DOM, the
 `tabindex` atribute must be set on the custom element's host element.
@param {HTMLElement|string} [target] The Element or id of the Element
    that the map is rendered in.
@observable
@api