How should a Pino instance be identified in runtime?

[gerardo-lima-moonfare]

First of all, thank you very much for the great work!

I am trying to assess a runtime object is an instance of Pino. I found that pino instances do have a constructor, though it's not exported to consumers:

pino/lib/proto.js

Line 54 in 8db130e

const constructor = class Pino {}

I can, then, use logger.constructor.name === 'Pino', but I wonder whether it would make sense to export this class, to allow logger instanceOf Pino.

[jsumners]

Don't trust the instanceof operator fastify/fastify-error#86 (comment)

Generally, to accomplish what you're asking about you should test if the methods you expect are present on the object.

Personally, I would not be opposed to exposing a read-only property that indicates the object is a Pino instance.