Function QLThumbnailCreate 

pub unsafe extern "C-unwind" fn QLThumbnailCreate(
    allocator: Option<&CFAllocator>,
    url: Option<&CFURL>,
    max_thumbnail_size: CGSize,
    options: Option<&CFDictionary>,
) -> Option<CFRetained<QLThumbnail>>

👎Deprecated: renamed to QLThumbnail::new

Available on crate feature QLThumbnail only.