Where can one find the list of all functions available under firebase-admin? firebase-functions?

I'm testing out writing code with Firebase Cloud Functions.

with

const admin = require('firebase-admin'); const functions = require('firebase-functions');

Where can one find the list of all functions available under admin, or functions, or any other popular or recommended firebase or Node.js sets of functions?

btw shouldn't there be a firebase-cloud-functions tag?

Thanks!

via Cris