/// <summary>
/// Gets the <see cref="VolumeCache"/> for the specified <see cref="IImageViewer"/> instance.
/// </summary>
public static VolumeCache GetVolumeCache(this IImageViewer imageViewer)
{
Platform.CheckForNullReference(imageViewer, "imageViewer");
var instance = imageViewer.ExtensionData[typeof(VolumeCache)] as VolumeCache;
if (instance == null)
{
imageViewer.ExtensionData[typeof(VolumeCache)] = instance = new VolumeCache();
}
return(instance);
}