/**
* @param string $source Name of foreign source (ex., "people")
* @param array $constraints Array of key/value constraints (ex., "id" => 1)
* @return array
*/
protected function getForeignRecord($source, array $constraints = [])
{
// @todo Cache foreign records instead of reading off disk every time
$sourceForeign = $this->source->parent()->child("{$source}.json");
$dataForeign = new Data($sourceForeign);
return $dataForeign->getRecords($constraints);
}
