What does the .correctName means?

[ const fileName = (filesToLoad[0] as any).correctName;
what is the means of the correctName, i can’t code completion with it… so what does the correctName property done?
[(Babylon.js/renderingZone.tsx at 2ff0c770a1af877d180f82463dacbc3b77dbfc5a · BabylonJS/Babylon.js · GitHub)]

Welcome aboard!

This property is set by the FileInput class:

OK, i see. thanks!