'Native representation of this property.
Given a value retrieved from a datastore entity, return a value,
possibly converted, to be stored on the model instance.  Usually
this returns the value unchanged, but a property class may
override this when it uses a different datatype on the model
instance than on the entity.
This API is not quite symmetric with get_value_for_datastore(),
because the model instance on which to store the converted value
may not exist yet -- we may be collecting values to be passed to a
model constructor.
Args:
value: value retrieved from the datastore entity.
Returns:
The value converted for use as a model instance attribute.'

def make_value_from_datastore(self, value):

    return value
