Function CGGradientCreateWithContentHeadroom 

pub unsafe extern "C-unwind" fn CGGradientCreateWithContentHeadroom(
    headroom: c_float,
    space: Option<&CGColorSpace>,
    components: *const CGFloat,
    locations: *const CGFloat,
    count: usize,
) -> Option<CFRetained<CGGradient>>

👎Deprecated: renamed to CGGradient::with_content_headroom

Available on crate features CGColorSpace and CGGradient only.