Geo Mashup google v3 custom marker z-index for a marker with an object with category ID 9

custom-googlev3.js

(function( $ ) {
  GeoMashup.addAction( 'loadedMap', function( properties, mxn_map ) {
    $.each( mxn_map.markers, function( i, marker ) {
      var objects = GeoMashup.getMarkerObjects( marker );
      $.each( objects, function( j, object ) {
        $.each( object.categories, function( k, category_id ) {
          if ( 9 == category_id ) {
            marker.proprietary_marker.setZIndex( 100 );
          }
        });
      });   
    });
  });
}(jQuery));