MessageCollection::getFiles

public function getFiles(): FileCollection
{
	$this->fillFiles();

	$files = new FileCollection();

	foreach ($this as $message)
	{
		$filesFromMessage = $message->getFiles();
		foreach ($filesFromMessage as $fileFromMessage)
		{
			$files[] = $fileFromMessage;
		}
	}

	return $files->getUnique();
}