'Converts a v4 point Entity to a v3 PointValue.
Args:
v4_point_entity: an entity_v4_pb.Entity representing a point
v3_point_value: an entity_pb.Property_PointValue to populate'

def __v4_to_v3_point_value(self, v4_point_entity, v3_point_value):

    v3_point_value.Clear()
    name_to_v4_property = self.__build_name_to_v4_property_map(v4_point_entity)
    v3_point_value.set_x(self.__get_v4_double_value(name_to_v4_property['x']))
    v3_point_value.set_y(self.__get_v4_double_value(name_to_v4_property['y']))
