question: public static File locateReplicatorConfDir ( ) { if ( replicatorConfDir == null ) { String replicatorConf = System . getProperty ( CONF_DIR ) ; if ( replicatorConf == null ) replicatorConfDir = new File ( locateReplicatorHomeDir ( ) , "conf" ) ; else replicatorConfDir = new File ( replicatorConf ) ; if ( ! replicatorConfDir . isDirectory ( ) ) { throw new ServerRuntimeException ( "Replicator conf directory does not exist or is invalid: " + replicatorConfDir ) ; } } return replicatorConfDir ; }
target:  Locate and return the replicator conf director.