docs: def get_current_bios_settings(self, only_allowed_settings=True):
          """Get current BIOS settings.
  
          :param: only_allowed_settings: True when only allowed BIOS settings
                  are to be returned. If False, All the BIOS settings supported
                  by iLO are returned.
          :return: a dictionary of current BIOS settings is returned. Depending
                   on the 'only_allowed_settings', either only the allowed
                   settings are returned or all the supported settings are
                   returned.
          :raises: IloError, on an error from iLO
          """
          sushy_system = self._get_sushy_system(PROLIANT_SYSTEM_ID)
          try:
              current_settings = sushy_system.bios_settings.json
          except sushy.exceptions.SushyError as e:
              msg = (self._('The current BIOS Settings were not found. Error '
                            '%(error)s') %
                     {'error': str(e)})
              LOG.debug(msg)
              raise exception.IloError(msg)
  
          attributes = current_settings.get("Attributes")
          if only_allowed_settings and attributes:
              return common_utils.apply_bios_properties_filter(
                  attributes, ilo_cons.SUPPORTED_REDFISH_BIOS_PROPERTIES)
          return attributes