def _get_value(self, entity):
    value = self._get_user_value(entity)
    if value is None and entity._projection:
      # Invoke super _get_value() to raise the proper exception.
      return super(StructuredProperty, self)._get_value(entity)
    return value
Retrieve inband target field index
dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py/StructuredProperty._get_value--crossover with--dataset/ETHPy150Open sysdream/pysqli/pysqli/core/context.py/Context.get_inband_target