code: public static LocalCall<List<String>> readdir(String path) {
          return new LocalCall<>("file.readdir", Optional.of(Collections.singletonList(path)),
                  Optional.empty(), new TypeToken<List<String>>(){});
      }
docs: Returns a list containing the contents of a directory
  
  @param path  Path to directory
  @return      The {@link LocalCall} object to make the call