question: public List closeBucketAdvisors ( ) { List primariesHeld = Collections . EMPTY_LIST ; if ( this . buckets != null ) { for ( int i = 0 ; i < this . buckets . length ; i ++ ) { ProxyBucketRegion pbr = this . buckets [ i ] ; if ( pbr . isPrimary ( ) ) { if ( primariesHeld == Collections . EMPTY_LIST ) { primariesHeld = new ArrayList ( ) ; } primariesHeld . add ( Integer . valueOf ( i ) ) ; } pbr . close ( ) ; } } return primariesHeld ; }
target:  Close the bucket advisors, releasing any locks for primary buckets