text: import { createAppContainer } from 'react-navigation';
  import { createStackNavigator } from 'react-navigation-stack';
  import Main from './pages/Main';
  import Profile from './pages/Profile';
  
  
  const Routes = createAppContainer(
      createStackNavigator({
          Main: {
              screen: Main,
              navigationOptions: {
                  title: 'DevRadar'
              }
          },
          Profile: {
              screen: Profile,
              navigationOptions: {
                  title: 'Perfil no Github'
              }
          }
      }, {
          defaultNavigationOptions: {
              headerTintColor: '#FFF',
              headerStyle: {
                  backgroundColor: '#7D40E7'
              },
          }
      })
  );
  
  export default Routes;
  