protected function import(string $name, string $relationship, array $options = []): Field
    {
        $source = $this->get($relationship);
        $reference = $source->getReferences();

        $class = off($reference, 'class');
        if (!class_exists($class)) {
            throw new SimplesRunTimeError("Cant not import '{$name}' from '{$class}'");
        }

        /** @var DataMapper $class */
        $import = $class::instance()->get($name);

        $options = array_merge($import->getOptions(), $options);

        $from = new Field($import->getCollection(), $name, $import->getType(), $options);
        $this->fields[$name] = $from->from($source);

        return $this->fields[$name];
    }