CEntityQueryChain::getDefinitionByChain

static function getDefinitionByChain(CEntityQueryChain $chain)
{
	$def = array();

	// add members of chain except of init entity
	$elements = array_slice($chain->getAllElements(), 1);

	foreach ($elements  as $element)
	{
		$def[] = $element->getDefinitionFragment();
	}

	return join('.', $def);
}