Association.php

        $property = $options['propertyPath'];
        $propertyPath = explode('.', $property);
        $query->formatResults(function ($results) use ($formatters, $property, $propertyPath) {
            $extracted = [];
            foreach ($results as $result) {
                foreach ($propertyPath as $propertyPathItem) {
                    $result = $result[$propertyPathItem];
                }
                $extracted[] = $result;
            }
            $extracted = new Collection($extracted);
            foreach ($formatters as $callable) {
                $extracted = new ResultSetDecorator($callable($extracted));
            }
            return $results->insert($property, $extracted);
        }, Query::PREPEND);