question: public boolean verifyTimeoutCode ( String timeoutCode , int pastIntervals , int futureIntervals ) throws GeneralSecurityException { long currentInterval = clock . getCurrentInterval ( ) ; String expectedResponse = generateResponseCode ( currentInterval ) ; if ( expectedResponse . equals ( timeoutCode ) ) { return true ; } for ( int i = 1 ; i <= pastIntervals ; i ++ ) { String pastResponse = generateResponseCode ( currentInterval - i ) ; if ( pastResponse . equals ( timeoutCode ) ) { return true ; } } for ( int i = 1 ; i <= futureIntervals ; i ++ ) { String futureResponse = generateResponseCode ( currentInterval + i ) ; if ( futureResponse . equals ( timeoutCode ) ) { return true ; } } return false ; }
target:  Verify a timeout code. The timeout code will be valid for a time determined by the interval period and the number of adjacent intervals checked.