code: public boolean removeAtPath(final Path path) {
  		final Optional<TreeNode<T>> parent = childAtPath(path)
  			.flatMap(Tree::getParent);
  
  		parent.ifPresent(p -> p.remove(path.get(path.length() - 1)));
  		return parent.isPresent();
  	}
docs: Removes the child at the given {@code path}. If no child exists at the
  given path, nothing is removed.
  
  @since 4.4
  
  @param path the path of the child to replace
  @return {@code true} if a child at the given {@code path} existed and
  has been removed
  @throws NullPointerException if one of the given argument is {@code null}