const cities = coreApp.odm.newModel("city", locationPure, {
    country: {
      schemaName: "country",
      type: "single",
      optional: false,
      relatedRelations: {
        cities: {
          type: "multiple",
          limit: 5,
          sort: {
            field: "_id",
            order: "asc",
          },
        },
      },
    },
  });
      
const selectStruct = coreApp.schemas.selectStruct("city", {});
    
  

    
{
  "type": "object",
  "schema": {
    "_id": {
      "type": "enums",
      "schema": {
        "0": 0,
        "1": 1
      }
    },
    "name": {
      "type": "enums",
      "schema": {
        "0": 0,
        "1": 1
      }
    },
    "population": {
      "type": "enums",
      "schema": {
        "0": 0,
        "1": 1
      }
    },
    "abb": {
      "type": "enums",
      "schema": {
        "0": 0,
        "1": 1
      }
    }
  }
}