DuplicateVolatileCriterion::filterValidTypes

static function filterValidTypes(array $volatileTypes)
{
	$volatileTypeMap = [];

	foreach ($volatileTypes as $volatileTypeId)
	{
		$volatileTypeId = (int)$volatileTypeId;
		if (static::isSupportedType($volatileTypeId))
		{
			$volatileTypeMap[$volatileTypeId] = true;
		}
	}

	return array_keys($volatileTypeMap);
}