Is there an eventhandler for model load start?

i am implementing a babylon instance which loads a model ( from the local filesystem ) using
the BABYLON.SceneLoader.Append method.
I could find the error, progress and complete handlers and I am wondering if there is a loadstart handler as well?


Where exactly do you want to attach a function? Because load-start would be right after calling this function

it would be after the connection to the server / OS is made and before the first progress event would fire.