Multi-layer feature service with Custom Data Feeds

[MarynaBerg]

I am struggling to create a multi-layer feature service with Custom Data Feeds. Function getData returns a geojson of this structure: 

const geojson = {

      type: "MultiLayerFeatureCollection",

      layers: [

        {

          layerName: "Agriculture Layer 0",

          type: "FeatureCollection",

          features: layer0Features,

          metadata: layer0Metadata

        },

        {

          layerName: "Agriculture Layer 1",

          type: "FeatureCollection",

          features: layer1Features,

          metadata: layer1Metadata

        }

      ]

    };

I see the layers being read properly (with all the fields etc) when i access them on localhost:8080/nbfsprovider/rest/services/:host/:id/FeatureServer/layers, but when i try to access them individually localhost:8080/nbfsprovider/rest/services/:host/:id/FeatureServer/0 it does not seem like they are read: there is no data and only one field registered - OBJECTID. 

Since I have a possibility to check layers, then I suppose that it should be possible to create a feature class with multiple layers. So I guess the problem should be somewhere in the json structure passed as the output of the model.js.