question: stop the refresher timer if it was started concode_field_sep ScheduledExecutorService _scheduler concode_elem_sep ScheduledFuture<?> _refresherTask concode_elem_sep ResourceManager _rm concode_field_sep Map<String,QueueSet> saveQueueSets concode_elem_sep void reattachQueueSets concode_elem_sep void refresh concode_elem_sep void refresh concode_elem_sep void run
target: List < Runnable > function ( ) { if ( _refresherTask != null ) { _refresherTask . cancel ( true ) ; return _scheduler . shutdownNow ( ) ; } return null ; }