Elasticquent\ElasticquentTrait::loadRelationsAttributesRecursive PHP Method

    public static function loadRelationsAttributesRecursive(Model $model)
    {
        $attributes = $model->getAttributes();
        foreach ($attributes as $key => $value) {
            if (method_exists($model, $key)) {
                $reflection_method = new ReflectionMethod($model, $key);
                if ($reflection_method->class != "Illuminate\\Database\\Eloquent\\Model") {
                    $relation = $model->{$key}();
                    if ($relation instanceof Relation) {
                        // Check if the relation field is single model or collections
                        if (is_null($value) === true || !static::isMultiLevelArray($value)) {
                            $value = [$value];
                        }
                        $models = static::hydrateRecursive($relation->getModel(), $value, $relation);
                        // Unset attribute before match relation
                        unset($model[$key]);
                        $relation->match([$model], $models, $key);
                    }
                }
            }
        }
    }