docs: function (options, callback) {
  
  			fs.stat(options.file_path, function (err, stats) {
  
  				if (err) {
  					callback(err);
  				}
  				else {
  					var local_date = new Date(stats.mtime).getTime();
  					var server_date = new Date(options.server_date).getTime();
  
  					if (options.compare_date === 'newer') {
  						callback(null, local_date > server_date);
  					}
  					else {
  						callback(null, local_date < server_date);
  					}
  				}
  			});
  		}