Function uikit_sys::CGShadingCreateRadial

pub unsafe extern "C" fn CGShadingCreateRadial(
    space: CGColorSpaceRef, 
    start: CGPoint, 
    startRadius: CGFloat, 
    end: CGPoint, 
    endRadius: CGFloat, 
    function: CGFunctionRef, 
    extendStart: bool, 
    extendEnd: bool
) -> CGShadingRef