void CreateNewOrigin()
{
Origin newOrigin = Origin.CreateNewOrigin();
OriginViewModel workspace = new OriginViewModel(newOrigin, _originService);
this.Workspaces.Add(workspace);
this.SetActiveWorkspace(workspace);
}
void OnOriginAddedToRepository(object sender, EntityAddedEventArgs<Origin> e)
{
var viewModel = new OriginViewModel(e.NewEntity, _originService);
this.AllOrigins.Add(viewModel);
}