private static String computeSdkRegistrantsKeyV3(){
  return SDK_REGISTRANTS_KEY_PREFIX + "_" + getInstallationId();
}

private static String computeSdkRegistrantsKeyV3 ( ) { return SDK_REGISTRANTS_KEY_PREFIX + "_" + getInstallationId ( ) ; }
version 1 key was just " sdkregistrants " . version 2 key was " sdkregistrants_installationpath " ( see computesdkregistrantskeyv2 above ) . version 3 key is " sdkregistrants_installationid " .
