From c56a6616cad9d58eea83d2405157019d434f556d Mon Sep 17 00:00:00 2001
From: Timo Hocker <t-hocker@web.de>
Date: Wed, 6 May 2020 10:52:04 +0200
Subject: [PATCH] allow other return types

---
 lib/Graphable.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Graphable.ts b/lib/Graphable.ts
index 4450029..fc4f3b5 100644
--- a/lib/Graphable.ts
+++ b/lib/Graphable.ts
@@ -1,5 +1,5 @@
 import { Graph } from './Graph';
 
 export interface Graphable {
-  to_graph(g: Graph, ...args: unknown[]): void;
+  to_graph(g: Graph, ...args: unknown[]): unknown;
 }