ToSnakeCase::__invoke

public function __invoke(array $fields): array
{
	$converter = new Converter(
		Converter::KEYS
		| Converter::RECURSIVE
		| Converter::TO_SNAKE
		| Converter::TO_SNAKE_DIGIT
	);
	$result = $converter->process($fields);

	return is_array($result) ? $result : $fields;
}