From 82d4535180bcf43e1d32408e9c8ff215ecd36943 Mon Sep 17 00:00:00 2001
From: Roemer Vlasveld <roemer@inspire.nl>
Date: Mon, 21 Jan 2013 22:36:24 +0100
Subject: [PATCH] Add hasLayer to LayerGroup Add the method hasLayer to
 LayerGroup, return false when not present or checking for a null layer.

---
 src/layer/LayerGroup.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/layer/LayerGroup.js b/src/layer/LayerGroup.js
index b593b59e..3b0166a7 100644
--- a/src/layer/LayerGroup.js
+++ b/src/layer/LayerGroup.js
@@ -40,6 +40,13 @@ L.LayerGroup = L.Class.extend({
 		return this;
 	},
 
+	hasLayer: function (layer) {
+		if (!layer) { return false; }
+
+		var id = L.stamp(layer);
+		return this._layers.hasOwnProperty(id);
+	}
+
 	clearLayers: function () {
 		this.eachLayer(this.removeLayer, this);
 		return this;