code: private boolean classExists(File directory, String name) {
      String baseName = getBaseFileName(name);
      File classFile = new File(directory, baseName + CLASS_EXTENSION);
      File digestFile = new File(directory, baseName + DIGEST_EXTENSION);
  
      return classFile.isFile() && digestFile.isFile();
    }
docs: Determines if the specified class exists in the specified directory
  tree.
  @param directory The root of the directory tree to examine.
  @param name The fully qualified name of the class.
  @return A value indicating if the class exists in the given directory
  tree.