From 3c295a79a84db3affe77b9081b0cb63961c4cf55 Mon Sep 17 00:00:00 2001
From: Sam Saccone <samccone@gmail.com>
Date: Mon, 24 Dec 2018 16:51:20 -0800
Subject: [PATCH] Add lastGeneratedColumn to typing for MappingItem

This is generated when someone calls `computeColumnSpans` so we mark the property as optional as well.
---
 source-map.d.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source-map.d.ts b/source-map.d.ts
index 24593915..e856c66e 100644
--- a/source-map.d.ts
+++ b/source-map.d.ts
@@ -61,6 +61,7 @@ export interface MappingItem {
     source: string;
     generatedLine: number;
     generatedColumn: number;
+    lastGeneratedColumn: number | null;
     originalLine: number;
     originalColumn: number;
     name: string;