internal static extern bool MagickSetImageAlphaChannel(IntPtr wand, AlphaChannelType alpha_type);
internal static extern bool MagickSetImageAlphaChannel(IntPtr wand, AlphaChannelType alpha_type);
internal static extern bool MagickSetImageAlphaChannel(IntPtr wand, AlphaChannelType alpha_type);
internal static extern bool MagickSetImageAlphaChannel(IntPtr wand, AlphaChannelType alpha_type);