code: public static boolean isAncestorOrSame(URI descendant, URI ancestor) {
      Preconditions.checkNotNull(descendant, "input can not be null");
      Preconditions.checkNotNull(ancestor, "input can not be null");
  
      if (!stringSame(descendant.getScheme(), ancestor.getScheme())) {
        return false;
      }
  
      if (!stringSame(descendant.getAuthority(), ancestor.getAuthority())) {
        return false;
      }
  
      return isAncestorOrSame(getConfigKeyPath(descendant.getPath()), getConfigKeyPath(ancestor.getPath()));
    }
docs: Utility method to check whether one URI is the ancestor of the other
  
  return true iff both URI's scheme/authority name match and ancestor's path is the prefix of the descendant's path
  @param descendant: the descendant URI to check
  @param ancestor  : the ancestor URI to check
  @return