Error handling of appendScene function

I have programmatically implemented “appendScene” function in visual_logic.js to append several (say 10) glTFs. Like so:

var arr[] = {one.gltf, two.gltf,..., ten.gltf};
for(var i=0; i<10;i++){
appendScene(arr, arr, false, false, function() {}, function() {}, function() {console.log("Error"});
}


If some glTFs are missing/erroneous, I am printing “Error” in the console. This works fine. But is there a way to print which of the glTFs is missing/erroneous?