Import glb files in editor time

[Singh-sid930]

Hi,
I have copied over glb files in the Assets directory and I can drag and drop them into the editor window with ease.
However, I would like to be able to do this programmatically through a custom editor button.
I have been trying to make that happen but getting the same error as this issue
#696
note that the issue is triggered at the initialization of the GltfImport() object itself.
Is there any way to accomplish loading a glb file at editor time by using a custom editor gui button ?