code: public static void findXmlFiles(ChildesParser parser,
                                      boolean utterancePerDoc,
                                      File directory) {
          File[] files = directory.listFiles();
          for (File file : files) {
              if (file.isDirectory())
                  findXmlFiles(parser, utterancePerDoc, file);
              else if (file.isFile() && file.getPath().endsWith(".xml"))
                  parser.parseFile(file, utterancePerDoc);
          }
      }
docs: Recursively finds any xml documents to parse.