Numerator::createGeneratorsOfTypes

private function createGeneratorsOfTypes($generatorTypesToCreate)
{
	$generators = [];
	foreach ($generatorTypesToCreate as $key => $type)
	{
		if ($generator = static::getNumberGeneratorFactory()->createGeneratorByType($type))
		{
			$generators[] = $generator;
		}
	}

	return $generators;
}