AntonPuko

import type { NavigationAction, NavigationParams } from 'react-navigation';

import * as React from 'react';
import { BackHandler } from 'react-native';
import { NavigationActions, StackNavigator, addNavigationHelpers } from 'react-navigation';
import { action, observable } from 'mobx';
import { observer } from 'mobx-react';

const RootNavigator = StackNavigator(
  {