Function uikit_sys::CGContextDrawRadialGradient

pub unsafe extern "C" fn CGContextDrawRadialGradient(
    c: CGContextRef, 
    gradient: CGGradientRef, 
    startCenter: CGPoint, 
    startRadius: CGFloat, 
    endCenter: CGPoint, 
    endRadius: CGFloat, 
    options: CGGradientDrawingOptions
)