diff --git a/src/vs/base/common/map.ts b/src/vs/base/common/map.ts
index 7e9149df2eb..8977b6d4b32 100644
--- a/src/vs/base/common/map.ts
+++ b/src/vs/base/common/map.ts
@@ -16,6 +16,10 @@ export interface Entry<K, T> {
 	value: T;
 }
 
+/**
+ * A simple map to store value by a key object. Key can be any object that has toString() function to get
+ * string value of the key.
+ */
 export class SimpleMap<K extends Key, T> {
 
 	protected map: { [key: string]: Entry<K, T> };
diff --git a/src/vs/workbench/buildfile.js b/src/vs/workbench/buildfile.js
index c88fc7c3114..cbc4c84efc7 100644
--- a/src/vs/workbench/buildfile.js
+++ b/src/vs/workbench/buildfile.js
@@ -34,7 +34,7 @@ exports.collectModules = function(excludes) {
 		createModuleDescription('vs/workbench/parts/debug/browser/debugViewlet', excludes),
 		createModuleDescription('vs/workbench/parts/debug/browser/repl', excludes),
 
-		createModuleDescription('vs/workbench/parts/errorList/browser/errorList', excludes),
+		createModuleDescription('vs/workbench/parts/markers/browser/MarkersPanel', excludes),
 
 		createModuleDescription('vs/workbench/parts/terminal/electron-browser/terminalPanel', excludes),
 
diff --git a/src/vs/workbench/parts/markers/ProblemsView.todo b/src/vs/workbench/parts/markers/ProblemsView.todo
index b8a5334d3db..be4d6dcda76 100644
--- a/src/vs/workbench/parts/markers/ProblemsView.todo
+++ b/src/vs/workbench/parts/markers/ProblemsView.todo
@@ -30,6 +30,11 @@ Problems Panel:
 		☐ Do not expand the file again if the user closes it
 		☐ Expand a file if there is a new error after it was removed from the panel
 
+	Infra Changes:
+		☐ Introduced a simple map in maps
+		☐ Fixed toggle class in dom
+		☐ Fixed getActions to modify the copy
+
 	Clean Up:
 		☐ Messages file - put strings under quotes
 		☐ Markers handler in quick open contributions