question: public void destroyBucket ( AutoMixBucket bucket ) { SharedPreferences prefs = getPrefs ( ) ; SharedPreferences . Editor editor = prefs . edit ( ) ; Set < String > set = new TreeSet < > ( prefs . getStringSet ( PREF_BUCKETS_IDS , new TreeSet < String > ( ) ) ) ; set . remove ( bucket . getSessionId ( ) ) ; editor . putStringSet ( PREF_BUCKETS_IDS , set ) ; editor . apply ( ) ; mBuckets . remove ( bucket ) ; }
target:  Destroys the provided bucket