DFreds

void main() {
   
  List<Person> list = [
    Person(name: "Peter", age: 25),
    Person(name: "Peter", age: 22),
    Person(name: "John", age: 26),
    Person(name: "Max", age: 26)
  ];
  
  print("Unsorted: $list");

DFreds

package com.upmc.enterprises.myupmc

import android.support.v7.widget.GridLayoutManager
import android.support.v7.widget.LinearLayoutManager
import android.support.v7.widget.RecyclerView
import android.support.v7.widget.StaggeredGridLayoutManager

abstract class EndlessRecyclerViewScrollListener(
        private val layoutManager: RecyclerView.LayoutManager,
        private val indexDelta: Int = 20

DFreds

class MainActivity : AppCompatActivity() {

    private lateinit var viewModel: MainViewModel

    override fun onCreate(savedInstanceState: Bundle?) {

        // init view code....
      
        viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
        viewModel.response.observe(this, Observer { processResponse(it) })