From b0148c604bccdda5d929e439de27ed4709736631 Mon Sep 17 00:00:00 2001
From: Andrew Mason <amason@slack-corp.com>
Date: Sun, 17 Oct 2021 10:31:45 -0400
Subject: [PATCH] Add `ExternalTopo` to the interface and implement it

Signed-off-by: Andrew Mason <amason@slack-corp.com>
Signed-off-by: Vilius Okockis <vilius.okockis@vinted.com>