Problems using ResourceDocument::fromObject

[ArminSchulz]

Hi, we use your implementation quite a lot in our projets, and until now, never had any problems (we appreciate your work tremendously).
But now we have problems with answering a PUT request.
using your code leads to a structure were the attributes of an ResourceObject more or less look like this

"data": {
"type": "Event",
"id": "196",
"attributes":{
"type": "Event",
"id": "196",
"attributes": {
"ClientID": 1
}
}
}
which leads to an exception (type already used)

A solutions which works for us is simply:
rewriting the function in ResourceDocument in this way:

public static function fromObject($attributes, $type=null, $id=null, array $options=[]) {
$resourceDocument = new self();
$resourceDocument->setPrimaryResource($attributes->getResource(), $options);
return $resourceDocument;
}
the document includes now all links, relationships, and so on, from the ResourceObject