public void MergeManyToManyRelations()
		{
			var destination = new ExplicitDeclarationsHolder();
			var source = new ExplicitDeclarationsHolder();
			source.AddAsManyToManyItemRelation(property);

			destination.Merge(source);
			Assert.That(destination.ItemManyToManyRelations, Has.Count.EqualTo(1));
		}