setTarget(target) {
    this.target_ =
      typeof target === 'string' ? document.getElementById(target) : target;
  }
This function is used to set a target element for the control. It has no
effect if it is called after the control has been added to the map (i.e.
after `setMap` is called on the control). If no `target` is set in the
options passed to the control constructor and if `setTarget` is not called
then the control is added to the map's overlay container.
@param {HTMLElement|string} target Target.
@api