code: public File getDataDirectorty() {
          final String prop = PathUtil.resolve(getProperty(AlpineKey.DATA_DIRECTORY));
          return new File(prop).getAbsoluteFile();
      }
docs: Returns the fully qualified path to the configured data directory.
  Expects a fully qualified path or a path starting with ~/
  
  Defaults to ~/.alpine if data directory is not specified.
  @return a File object of the data directory
  @since 1.0.0