Is there an equivalent to Flask's flask.g in Meteor?

flask.g: API — Flask Documentation (2.2.x)

Looking for a way to populate some variables that are available throughout the course of the same request. Thanks!

In which context? Method call, publication call? Http request? What kind of data would you like to add to the request?

Specifically Meteor methods Methods | Meteor Guide for now but possibly others in the future.

We are adding Datadog tracing calls to various code locations invoked by Meteor methods, and we’d like to generate and save a trace ID for these tracing calls to pass along so that all invocations for the same Meteor method can be grouped together by Datadog.

Do you use ValidatedMethods with mixins for that?