isLayerFilteringRequired(sReference) {
			var oFlexInfoSession = FlexInfoSession.getByReference(sReference);
			var sMaxLayer = oFlexInfoSession.maxLayer ? oFlexInfoSession.maxLayer : LayerUtils._sTopLayer;
			return this._sTopLayer !== sMaxLayer;
		}
Determines if filtering of changes based on layer is required.

@returns {boolean} <code>true</code> if the top layer is also the max layer, otherwise <code>false</code>
@param {string} sReference - Reference of the application
@public