Art4\JsonApiClient\RelationshipCollection::parse PHP Method

    public function parse($object)
    {
        if (!is_object($object)) {
            throw new ValidationException('Relationships has to be an object, "' . gettype($object) . '" given.');
        }
        if (property_exists($object, 'type') or property_exists($object, 'id')) {
            throw new ValidationException('These properties are not allowed in attributes: `type`, `id`');
        }
        $object_vars = get_object_vars($object);
        if (count($object_vars) === 0) {
            return $this;
        }
        foreach ($object_vars as $name => $value) {
            if ($this->parent->has('attributes.' . $name)) {
                throw new ValidationException('"' . $name . '" property cannot be set because it exists already in parents Resource object.');
            }
            $relationship = $this->manager->getFactory()->make('Relationship', [$this->manager, $this]);
            $relationship->parse($value);
            $this->container->set($name, $relationship);
        }
        return $this;
    }