question: public void build ( SolrCore core , SolrIndexSearcher searcher ) throws IOException { LOG . info ( "build()" ) ; dictionary = dictionaryFactory . create ( core , searcher ) ; lookup . build ( dictionary ) ; if ( storeDir != null ) { File target = new File ( storeDir , factory . storeFileName ( ) ) ; if ( ! lookup . store ( new FileOutputStream ( target ) ) ) { LOG . error ( "Store Lookup build failed" ) ; } else { LOG . info ( "Stored suggest data to: " + target . getAbsolutePath ( ) ) ; } } }
target:  Build the underlying Lucene Suggester 