Example for how to dispatch an example event in Drupal 8?

example_dispatching_an_example_event.php

<?php
// Following is the example for How to dispatch an event in Drupal 8?

// Use the namespace of the ExampleEvent class 
use Drupal\example_events\ExampleEvent;

// load the Symfony event dispatcher object through services
$dispatcher = \Drupal::service('event_dispatcher');

// creating our event class object.
$event = new ExampleEvent($form_state->getValue('name'));

// dispatching the event through the ‘dispatch’  method, 
// passing event name and event object ‘$event’ as parameters.
$dispatcher->dispatch(ExampleEvent::SUBMIT, $event);