/// <summary>
/// Méthode invoquée lors de l'initialisation du viewModel en mode design
/// </summary>
protected override Task OnInitializeDesigner()
{
Users = new BulkObservableCollection <User>(DesignData.GenerateUsers());
Roles = DesignData.GenerateRoles().Select(r => new PresentationRole(this, r)).ToArray();
DesignData.LinkUsersWithRoles(Users, Roles.Select(r => r.Role));
Languages = DesignData.GenerateLanguages().ToArray();
CurrentUser = Users.First();
return(Task.CompletedTask);
}