From 062cc104da7b6abeac928be68b453e54b2d0c61a Mon Sep 17 00:00:00 2001
From: Arne Hassel <arne.hassel@gmail.com>
Date: Thu, 30 Apr 2020 20:24:45 +0200
Subject: [PATCH] Extended types for addStatement, as per Rubens suggestion

---
 src/formula.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/formula.ts b/src/formula.ts
index 7870ca2d1..c7867ef8a 100644
--- a/src/formula.ts
+++ b/src/formula.ts
@@ -122,8 +122,8 @@ export default class Formula extends Node {
   /** Add a statment object
    * @param {Statement} statement - An existing constructed statement to add
    */
-  addStatement (statement: Quad): number {
-    return this.add(statement) as number
+  addStatement (statement: Quad): Statement | null | this | number {
+    return this.add(statement)
   }
 
   /**