gistfile1.txt

        // Get a detached document from cache
        $someDude = ....; // Pull a detached document from the cache with name "John"
        
        // Use the postupdate annotation feature to trigger a call to sayMyName()
        // which simply echo's this persons name to stdout.
        $someDude->queuePostUpdateEvent(
            $someDude,
            'sayMyName',
            array()
        );
        
        // Get the managed version of this document
        $mergedDocument = $documentManager->merge($someDude);
        
        // Set the person's name to santa claus.
        $mergedDocument->setFirstName("Santa Claus");

        // Capture the output of what sayMyName() echos out 
        ob_start();
        $documentManager->flush($mergedDocument);
        $output = ob_get_clean();
        
        $this->assertEquals("John", $output); // <- Returns true