public override void Add(MapperComposite mapper)
{
if (this.Children.Any(a => a.Value.Equals(mapper.Value)))
{
throw new ExistingChildIdentifierException($"Child with identifier {mapper.Value} already added.");
}
this.Children.Add(mapper);
}
public override void Add(MapperComposite identifier)
{
throw new NotImplementedException();
}
