From dcf04b251c39d8de098e599678ec55d0878903ee Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Thu, 30 Nov 2017 16:39:19 +0000
Subject: [PATCH] Add comment

---
 src/github.com/matrix-org/dendrite/roomserver/api/output.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/github.com/matrix-org/dendrite/roomserver/api/output.go b/src/github.com/matrix-org/dendrite/roomserver/api/output.go
index 3c928202..4f35dbbc 100644
--- a/src/github.com/matrix-org/dendrite/roomserver/api/output.go
+++ b/src/github.com/matrix-org/dendrite/roomserver/api/output.go
@@ -66,6 +66,8 @@ func (o *OutputEvent) AddSpanFromContext(ctx context.Context) error {
 	return nil
 }
 
+// StartSpanAndReplaceContext produces a context and opentracing span from the
+// info embedded in OutputEvent
 func (o *OutputEvent) StartSpanAndReplaceContext(
 	ctx context.Context,
 ) (context.Context, opentracing.Span) {