Pantheon\Terminus\Collections\TerminusCollection::listing PHP Method

    public function listing($key = 'id', $value = 'name')
    {
        $members = array_combine(array_map(function ($member) use($key) {
            return $member->get($key);
        }, $this->models), array_map(function ($member) use($value) {
            if (is_scalar($value)) {
                return $member->get($value);
            }
            $list = [];
            foreach ($value as $item) {
                $list[$item] = $member->get($item);
            }
            return $list;
        }, $this->models));
        return $members;
    }