code: @Trivial
      public static String normalizeRelative(String relativePath) {
          relativePath = normalize(relativePath);
  
          if (pathIsAbsolute(relativePath))
              throw new MalformedLocationException("path must be relative (path=" + relativePath + ")");
  
          return relativePath;
      }
docs: Normalize a relative path using {@link #normalize(String)} and verify that the normalized path is
  an absolute path. Answer the normalized path.
  
  The path is required to be a relative path which uses forward slashes ('/').
  
  The normalized path is an absolute path according to the rules implemented by {@link #pathIsAbsolute(String)}.
  
  @param relativePath The relative path which is to be normalized. An exception will
  be thrown if the path is null.
  
  @return The normalized path.
  
  @throws MalformedLocationException Thrown if the normalized path is not an absolute path.