Function NSBestDepth 

pub unsafe extern "C-unwind" fn NSBestDepth(
    color_space: &NSColorSpaceName,
    bps: NSInteger,
    bpp: NSInteger,
    planar: bool,
    exact_match: *mut Bool,
) -> NSWindowDepth

Available on crate feature NSGraphics only.

Safety

exact_match must be a valid pointer or null.