FieldSynchronizer::getFieldItemMap

protected function getFieldItemMap($oldItems, $newItems)
{
	$itemIdMap = array();
	foreach($oldItems as $oldItem)
	{
		foreach($newItems as $newItem)
		{
			if($oldItem['VALUE'] == $newItem['VALUE'])
			{
				$itemIdMap[$oldItem['ID']] = $newItem['ID'];
			}
		}
	}

	return $itemIdMap;
}