resetInstance() public static method

public static resetInstance ( )
 public function setUp()
 {
     self::$plusSymbol = pack('H*', 'efbc8b');
     PhoneNumberUtil::resetInstance();
     ShortNumberInfo::resetInstance();
     $this->phoneUtil = PhoneNumberUtil::getInstance(PhoneNumberUtilTest::TEST_META_DATA_FILE_PREFIX, CountryCodeToRegionCodeMapForTesting::$countryCodeToRegionCodeMapForTesting);
     $this->shortInfo = ShortNumberInfo::getInstance();
 }
 public function shortNumberRegionList()
 {
     $returnList = array();
     PhoneNumberUtil::resetInstance();
     ShortNumberInfo::resetInstance();
     $shortNumberInfo = ShortNumberInfo::getInstance();
     foreach ($shortNumberInfo->getSupportedRegions() as $regionCode) {
         $returnList[] = array($regionCode);
     }
     return $returnList;
 }