This is the the driver for DB.DATASTORE described in Database abstraction with google apps script

The library reference is 

MPZF_EC6nOZFAjMRqCxEaUyz3TLx7pV4j


 This is a little more complicated that the other drivers, and in fact is made up of 3 different classes

Here is the code consisting of 3 modules

See more like this in Database abstraction with google apps script and Datastore driver