question: public static String extractValueFromStringSet ( String key , StringSetMap volumeInformation ) { try { StringSet availableValueSet = volumeInformation . get ( key ) ; if ( null != availableValueSet ) { for ( String value : availableValueSet ) { return value ; } } } catch ( Exception e ) { _logger . error ( e . getMessage ( ) , e ) ; } return null ; }
target:  extract value from a String Set This method is used, to get value from a StringSet of size 1.