I don't know what the comment you're replying to said, but further down the thread: > Electron's "_cornerMask" override was a dirty hack that was made in an ef

I don't know what the comment you're replying to said, but further down the thread: > Electron's "_cornerMask" override was a dirty hack that was made in an effort to fix an ancient issue with corner smoothing. So Electron used this private API to fix an issue that shouldn't have existed at all, as far as I can tell