Fix method parameter type

docs/api/core/Layers.html

@@ -61,7 +61,7 @@
 			Set membership to *layer*, and remove membership all other layers.
 		</div>
 
-		<h3>[method:Boolean test]( [param:Integer layers] )</h3>
+		<h3>[method:Boolean test]( [param:Layers layers] )</h3>
 		<div>
 			layers - a Layers object<br /><br />