         required:
           _id: @person3._id
           username: @person3.username
+          displayName: @person3.displayName
         optional:
           _id: @person3._id
           username: @person3.username

        required:
          _id: @person2._id
          username: @person2.username
        optional:
          _id: @person3._id
          username: @person3.username

        person:
          _id: @person2._id
          username: @person2.username
          displayName: @person2.displayName
        persons: [
          _id: @person2._id
          username: @person2.username
          displayName: @person2.displayName
        ,
          _id: @person3._id
          username: @person3.username
          displayName: @person3.displayName
        ]
        slug: 'subdocument-prefix-foobarz-subdocumentfoobarz-suffix'
        body: 'SubdocumentFooBarZ'
