code: def _find_usage_snapshots(self):
          
          logger.debug("Getting usage for EBS snapshots")
          snaps = paginate_dict(
              self.conn.describe_snapshots,
              OwnerIds=['self'],
              alc_marker_path=['NextToken'],
              alc_data_path=['Snapshots'],
              alc_marker_param='NextToken'
          )
          self.limits['Active snapshots']._add_current_usage(
              len(snaps['Snapshots']),
              aws_type='AWS::EC2::VolumeSnapshot'
          )
docs: find snapshot usage