nodejs-docs-samples/functions/background/index.js line 27

commit: f7b29b3

introduces 'event.data.myMessage'

IIUC 'event' object does not contain this property and the code does not work:

https://cloud.google.com/functions/docs/writing/background#event_parameter

A different and probably better mechanism is used here:

https://cloud.google.com/functions/docs/tutorials/pubsub#preparing_the_application