Capturing the response object in Guzzle 5

gistfile1.php

<?php 

    if (isset($this->username)) {
        $args['user'] = $this->username;
    }

    $command = $this->client->getCommand($command, $args);

    $command->getEmitter()->on('process', function(ProcessEvent $event) {
        $this->response = $event->getResponse();
    });

    try {
        $this->result = $this->client->execute($command);
    } catch (\GuzzleHttp\Command\Exception\CommandClientException $e) {
        // No Op - Response is saved above for interigation
    }