question: private boolean nodeExists ( StringTokenizer path ) throws BackingStoreException { String token = path . nextToken ( ) ; if ( token . equals ( "/" ) ) throw new IllegalArgumentException ( "Consecutive slashes in path" ) ; synchronized ( lock ) { AbstractPreferences child = kidCache . get ( token ) ; if ( child == null ) child = getChild ( token ) ; if ( child == null ) return false ; if ( ! path . hasMoreTokens ( ) ) return true ; path . nextToken ( ) ; if ( ! path . hasMoreTokens ( ) ) throw new IllegalArgumentException ( "Path ends with slash" ) ; return child . nodeExists ( path ) ; } }
target:  tokenizer contains <name> {'/' <name>}