question: public void enable ( ) throws IOException { synchronized ( optOutLock ) { if ( isOptOut ( ) ) { properties . setProperty ( "opt-out" , "false" ) ; properties . store ( new FileOutputStream ( configurationFile ) , "http://mcstats.org" ) ; } if ( thread == null ) { start ( ) ; } } }
target:  Enables metrics for the server by setting "opt-out" to false in the config file and starting the metrics task.