如何将NHibernate从表A映射到表A本身具有多对多？

public class TableAMapping : ClassMap<TableA>
{
    public TableAMapping()
    {
        Id(x => x.Id);
        Map(x => x.Name);
        HasManyToMany(x => x.RelatedTableAs)
            .Table("TableA_TableA")
            .ParentKeyColumn("TableAId")
            .ChildKeyColumn("RelatedTableAId")
            .Cascade.All();
    }
}

public class TableA_TableAMapping : ClassMap<TableA_TableA>
{
    public TableA_TableAMapping()
    {
        CompositeId()
            .KeyReference(x => x.TableA, "TableAId")
            .KeyReference(x => x.RelatedTableA, "RelatedTableAId");
    }
}

public class TableA
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual IList<TableA> RelatedTableAs { get; set; }
}

public class TableA_TableA
{
    public virtual TableA TableA { get; set; }
    public virtual TableA RelatedTableA { get; set; }
}