set marker zindex by marker id

jQuery(function($){
$('.wpgmza_map').on('wpgooglemaps_loaded', function(){
var mid = parseInt($(this).attr('data-map-id'));
MYMAP[mid].map.on('markersplaced', function(event){
$.each(wpgmaps_localize_marker_data[mid], function(i, v){
MYMAP[mid].map.getMarkerByID(parseInt(v.marker_id)).googleMarker.setOptions({optimized: false});
MYMAP[mid].map.getMarkerByID(parseInt(v.marker_id)).googleMarker.setZIndex(1000+parseInt(v.marker_id));
});
});
});
});