docs: def userParamFromDict(attributes):
      """Python representation of a mzML userParam = tuple(name, value,
      unitAccession, type)
  
      :param attributes: #TODO: docstring
  
      :returns: #TODO: docstring
      """
      keys = ['name', 'value', 'unitAccession', 'type']
      return tuple(attributes[key] if key in attributes else None for key in keys)