question: public void writeExternal ( ObjectOutput out ) throws IOException { out . writeInt ( Vocabulary . size ( ) ) ; for ( int i = 0 ; i < Vocabulary . size ( ) ; i ++ ) { out . writeUTF ( Vocabulary . word ( i ) ) ; } out . writeDouble ( numTokens ) ; out . writeInt ( countFuncs . length ) ; for ( long [ ] countFunc : countFuncs ) { out . writeLong ( countFunc [ 0 ] ) ; out . writeLong ( countFunc [ 1 ] ) ; } out . writeInt ( typesFuncs . length ) ; for ( long [ ] typesFunc : typesFuncs ) { out . writeLong ( typesFunc [ 0 ] ) ; out . writeLong ( typesFunc [ 1 ] ) ; } out . writeDouble ( quantizationBase ) ; bf . writeExternal ( out ) ; }
target:  Write a Bloom filter LM to some external location.