code: private Analyzer createSearchingAnalyzer() {
          final Map<String, Analyzer> fieldAnalyzers = new HashMap<>();
          fieldAnalyzers.put(Fields.DOCUMENT_KEY, new KeywordAnalyzer());
          productFieldAnalyzer = new SearchFieldAnalyzer();
          vendorFieldAnalyzer = new SearchFieldAnalyzer();
          fieldAnalyzers.put(Fields.PRODUCT, productFieldAnalyzer);
          fieldAnalyzers.put(Fields.VENDOR, vendorFieldAnalyzer);
  
          return new PerFieldAnalyzerWrapper(new KeywordAnalyzer(), fieldAnalyzers);
      }
docs: Creates an Analyzer for searching the CPE Index.
  
  @return the CPE Analyzer.