# File lib/ferret/index.rb, line 191
191:     def highlight(query, doc_id, options = {})
192:       @dir.synchronize do
193:         ensure_searcher_open()
194:         @searcher.highlight(do_process_query(query),
195:                             doc_id,
196:                             options[:field]||@options[:default_field],
197:                             options)
198:       end
199:     end