}

      @Override
      public void assertDeleteSucceeded(Path path) throws IOException {
        assertFalse("file " + path + " not deleted with delete method " + this, Files.exists(path));
      }
    };

    abstract void delete(Path path, RecursiveDeleteOption... options) throws IOException;

    abstract void assertDeleteSucceeded(Path path) throws IOException;
  }

      }

      @Override
      public void assertDeleteSucceeded(Path path) throws IOException {
        assertFalse("file " + path + " not deleted with delete method " + this, Files.exists(path));
      }
    };

    abstract void delete(Path path, RecursiveDeleteOption... options) throws IOException;

    abstract void assertDeleteSucceeded(Path path) throws IOException;
  }