Hi there !I have this kind of document stored in MongoDB:{userid: "someuser",email: "validemail",location: "some city"acls: {"canedit": false,"canview": true}addresses: [{street: "",zipcode: ""},{street: "",zipcode: ""}]}for the first attributes no problem, they all map to a key of some type....but for acls and addressses....is there a way to describe this explicitly in MongoMapper, or do I have to add them as opaque "Hash" and "Array" ?