/// <summary>
/// Push a versioning state using the current version with a superimposed variation
/// </summary>
/// <param name="superimposition">ItemVersion to superimpose on current version</param>
/// <returns>A versioning context which ensures this pushed changed is removed</returns>
public VersioningContext PushSuperimposition(ItemVersion superimposition)
{
return(PushState(VersioningMode.Specific, CurrentVersion.Superimpose(superimposition)));
}