def __add_v4_property_to_entity(self, v4_entity, property_map, v3_property,
                                  indexed):
    """Adds a v4 Property to an entity or modifies an existing one.

    property_map is used to track of properties that have already been added.
    The same dict should be used for all of an entity's properties.

    Args:
      v4_entity: an entity_v4_pb.Entity
      property_map: a dict of name -> v4_property
      v3_property: an entity_pb.Property to convert to v4 and add to the dict
      indexed: whether the property is indexed
    """
    property_name = v3_property.name()
    if property_map in property_name:
      v4_property = property_map[property_name]
    else:
      v4_property = v4_entity.add_property()
      v4_property.set_name(property_name)
      property_map[property_name] = v4_property
    if v3_property.multiple():
      self.v3_property_to_v4_value(v3_property, indexed,
                                   v4_property.mutable_value().add_list_value())
    else:
      self.v3_property_to_v4_value(v3_property, indexed,
                                   v4_property.mutable_value())
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/datastore/datastore_pbs.py/_EntityConverter.__add_v4_property_to_entity/swapped operands of `in`