爆米花API:如何在自定义翻译上实现扩展?

我正在使用 Popcorn 允许API的客户端指定分解请求对象属性的深度。

数据模型如下所示:

public class DataModel {
    public List<Person> Persons { get; set; }
}

public class Person {
    public Guid Id { get; set; }
    public List<Pet> Pets {get; set;}

    public List<Pet> GetLivingPets() {
       // Do some computation to get the pets that are alive
    }
}

public class Pet {
    public Guid Id { get; set; }
    public string Name { get; set; }
    public bool Alive { get; set; }
}

public PetProjection {
    public Guid? Id { get; set; }
    public string Name { get; set; } 
}


public PersonProjection {
    public Guid? Id { get; set; }
    public List<PetProjection> LivingPets {get; set;}
}

我希望我的客户能够发出请求,指定动态生成的列表的嵌套。 http://localhost:5000/api/1/Persons?include=[Id,LivingPets[Name]]

返回如下列表:

[
    {
        "Id": "00000000-0000-0000-0000-000000000000",
        "LivingPets": [
            {
                "Name": "Capt Meowmix"
            }
        ]
    }
]

这是我正在尝试的映射:

popcornConfig
.Map<Person, PersonProjection>(config: (personConfig) =>
{

     personConfig.Translate(fp => fp.LivingPets, f => f.GetLivingPets()?.ToList()); // Error: 'Dictionary<string, object>' does not contain a definition for 'GetLivingPets' and no extension method 'GetLivingPets' accepting a first argument of type 'Dictionary<string, object>' could be found (are you missing a using directive or an assembly reference?)   

})
.MapEntityFramework<Pet, PetProjection, DataModel>(dbContextOptionsBuilder);

我需要做什么来编写一个映射,以利用我已经定义的另一个映射?这是图书馆可以做的事吗?我错过什么了吗?