/// <summary>
/// Initializes a new instance of the <see cref="ReadonlyViewBase{TSource,TMapped}"/> class.
/// </summary>
/// <param name="source">The source collection.</param>
/// <param name="mapper">The mapping function.</param>
/// <param name="leaveOpen">True means that the <paramref name="source"/> is not disposed when this instance is disposed.</param>
/// <param name="startEmpty">True means that the tracker is empty after the constructor.</param>
protected ReadonlyViewBase(IEnumerable <TSource> source, Func <IEnumerable <TSource>, IEnumerable <TMapped> > mapper, bool leaveOpen, bool startEmpty = false)
{
Ensure.NotNull(mapper, nameof(mapper));
this.mapper = mapper;
this.leaveOpen = leaveOpen;
this.source = source ?? EmptySource;
this.tracker = new CollectionSynchronizer <TMapped>(startEmpty ? mapper(EmptySource) : mapper(source));
}
protected SynchronizedEditableView(IList <T> source, IEnumerable <T> sourceItems)
{
Ensure.NotNull(source, nameof(source));
this.Source = source;
this.Tracker = new CollectionSynchronizer <T>(sourceItems);
}
