Hi, I need some of help 
this is my code:
_reportLayerInfo : function () {
console.warn('reportLayerInfo');
console.log(this.allLayerInfos);
var filteredArr = array.filter(this.allLayerInfos, function (item) {
return item.getSubLayers().length == 0;
});
console.warn('filtered layers infos');
console.log(filteredArr);
array.forEach(filteredArr,function(layer){
console.log(lang.hitch(this,this.map.getLayer(layer.id)));
});
}
(sorry, I dont known how put a code block)
So, _reportLayerInfo() method is activate when I clic a button, now, when I clic the button, the console shows me that error: Uncaught TypeError: this.map.getLayer is not a function.
As you can see, I used the lang.hitch because I thought that It was the solution.
Thanks a lot.