docs: def _get_role_description(self, role):
          """
          Returns the description of role.
  
          :param role: The role.
          :type role: str
          :return: The description of role.
          :rtype: str
          """
  
          parameter = 'role-' + role.lower()
          if self.configure.has_parameter(parameter):
              return self.configure.get_parameter(parameter)
          return None