code: def GetAdGroups(self, client_customer_id, campaign_id):
      
      self.client.SetClientCustomerId(client_customer_id)
      selector = {
          'fields': ['Id', 'Name', 'Status'],
          'predicates': [
              {
                  'field': 'CampaignId',
                  'operator': 'EQUALS',
                  'values': [campaign_id]
              },
              {
                  'field': 'Status',
                  'operator': 'NOT_EQUALS',
                  'values': ['REMOVED']
              }
          ]
      }
      adgroups = self.client.GetService('AdGroupService').get(selector)
  
      if int(adgroups['totalNumEntries']) > 0:
        return adgroups['entries']
      else:
        return None
docs: Retrieves all AdGroups for the given campaign that haven't been removed.
  
      Args:
        client_customer_id: str Client Customer Id being used in API request.
        campaign_id: str id of the campaign for which to fetch ad groups.
  
      Returns:
        list List of AdGroup data objects.