Sokil\Mongo\Client::debug PHP Method

    public function debug($enabled = true)
    {
        $this->debug = (bool) $enabled;
        return $this;
    }

 public function setUp()
 {
     // connect to mongo
     $client = new Client(getenv('PHPMONGO_DSN') ? getenv('PHPMONGO_DSN') : null);
     $client->debug();
     // select database
     $database = $client->getDatabase('test');
     // select collection
     $this->collection = $database->getCollection('phpmongo_test_collection');
 }