Returns the description of role.

        :param role: The role.
        :type role: str
        :return: The description of role.
        :rtype: str

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