Meteor.Error constructor can be also called with (number, string?, string?)

see: http://docs.meteor.com/\#/full/meteor_error
Even though  property is specified as  example right below shows usage with a number instead.

meteor/meteor.d.ts

@@ -522,10 +522,10 @@ declare module Match {
 declare module Meteor {
 	var Error: ErrorStatic;
 	interface ErrorStatic {
-		new(error: string, reason?: string, details?: string): Error;
+		new(error: string | number, reason?: string, details?: string): Error;
 	}
 	interface Error {
-		error: string;
+		error: string | number;
 		reason?: string;
 		details?: string;
 	}