Fluent nhibernate Fluent NHibernate HasManyToMany（）IDictionary复合ID问题

我使用的是Fluent NHibernate 1.1.1.694，它使用的语法与FNH1.0稍有不同，尤其是在字典映射方面

在我的模型中，我有员工、地址和地址类型邮政、实物等

public class Employee
{
    // <snip other properties />
    public virtual IDictionary Addresses { get; set; }

    public Employee()
    {
        this.Addresses = new Dictionary();
    }
}

public enum AddressType
{
    Physical,
    Postal
}

public class Address
{
    public virtual int Id { get; private set; }
    public virtual IList Lines { get; set; }
    public virtual string City { get; set; }
    public virtual string Zip { get; set; }
}

我的映射：

生成以下.hbm.xml代码段：

<map inverse="true" name="Addresses" table="EmployeeAddresses" mutable="true">
    <key>
        <column name="Employee_id" />
    </key>
    <index type="Domain.Entities.AddressType, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Key" />
    </index>
    <many-to-many class="Domain.Entities.Address, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Address_id" />
    </many-to-many>
</map>

我要生成的.hbm.xml是

<map inverse="true" name="Addresses" table="EmployeeAddresses" mutable="true">
    <key>
        <column name="IdentityType" />
        <column name="IdentityValue" />
    </key>
    <index type="Domain.Entities.AddressType, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Key" />
    </index>
    <many-to-many class="Domain.Entities.Address, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Address_id" />
    </many-to-many>
</map>

显然这将失败，因为我没有告诉它有一个复合ID用于父键。但是我找不到方法来告诉你。.HasManyToMany的.Columns和.ParentKeyColumns不存在

我应该如何绘制这张地图

<map inverse="true" name="Addresses" table="EmployeeAddresses" mutable="true">
    <key>
        <column name="IdentityType" />
        <column name="IdentityValue" />
    </key>
    <index type="Domain.Entities.AddressType, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Key" />
    </index>
    <many-to-many class="Domain.Entities.Address, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
        <column name="Address_id" />
    </many-to-many>
</map>