code: def __extend_uri(prefixes, short):
      
      for prefix in prefixes:
          if short.startswith(prefix):
              return short.replace(prefix + ':', prefixes[prefix])
      return short
docs: Extend a prefixed uri with the help of a specific dictionary of prefixes
      :param prefixes: Dictionary of prefixes
      :param short: Prefixed uri to be extended
      :return: