Query::getRegisteredChain

public function getRegisteredChain($key, $force_create = false)
{
	if (isset($this->global_chains[$key]))
	{
		return $this->global_chains[$key];
	}

	if ($force_create)
	{
		$chain = Chain::getChainByDefinition($this->entity, $key);
		$this->registerChain('global', $chain);

		return $chain;
	}

	return false;
}