code: def destination_encryption_configuration(self):
          
          prop = self._get_sub_prop("destinationEncryptionConfiguration")
          if prop is not None:
              prop = EncryptionConfiguration.from_api_repr(prop)
          return prop
docs: google.cloud.bigquery.table.EncryptionConfiguration: Custom
          encryption configuration for the destination table.
  
          Custom encryption configuration (e.g., Cloud KMS keys) or :data:`None`
          if using default encryption.
  
          See
          https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.load.destinationEncryptionConfiguration