internal static extern void CFRelease (CFTypeRef cf);
internal static extern CFTypeID CFGetTypeID(CFTypeRef cf);
internal static extern CFStringRef CFCopyDescription(CFTypeRef typeRef);
internal static extern IntPtr CFRetain(CFTypeRef cf);
internal static extern void CFRelease(CFTypeRef cf);
public static extern void CFRelease(CFTypeRef cf);
public static extern IntPtr CFRetain(CFTypeRef cf);