docs: def _get_logical_raid_levels(self):
          """Gets the different raid levels configured on a server.
  
          :returns a dictionary of logical_raid_levels set to true.
              Example if raid level 1+0 and 6 are configured, it returns
              {'logical_raid_level_10': 'true',
               'logical_raid_level_6': 'true'}
          """
          logical_drive_details = self._get_logical_drive_resource()
          raid_level = {}
          if logical_drive_details:
              for item in logical_drive_details:
                  if 'Raid' in item:
                      raid_level_var = "logical_raid_level_" + item['Raid']
                      raid_level.update({raid_level_var: 'true'})
          return raid_level if len(raid_level.keys()) > 0 else None