In Next.js local development, how can we see if the Data Cache was used for a `fetch()`?

Question

I am trying to determine if the Data Cache is being used for various fetch() requests in a code base.

I followed the docs and turned on logging.

I see the following log-output in the console after a fetch():

get be5c04a2d80c0564d8a8e9b3a6ba6a0e523ef37d18c1ffa485955424c354460d [ 'contentful-all', 'custom-revalidation-tag-one' ] FETCH false

get 987727a7bea1a67eac2d6a061a3b02c7bb2cbc29ce11537043a95123642f647b [ 'contentful-all', 'custom-revalidation-tag-two' ] FETCH true

Are the above logs somehow telling us whether the Data Cache was used? What does that last true|false mean?

If that does not tell us if the Data Cache was used, is there any other way to check that, in development?