function NativeLayer( config ) {

		// NativeLayer inherits from abstract layer "Layer"

		Layer.call( this, config );

		/**
		 * Hold handler for line group.
		 *
		 * @type { Object }
		 */

		this.lineGroupHandler = undefined;

		/**
		 * Identify whether layer is a merged layer or not.
	     * If it's a NativeLayer, "isMerged" is always false.
		 *
		 * @type {boolean}
		 */

		this.isMerged = false;

	}
Identify whether layer is a merged layer or not.
If it's a NativeLayer, "isMerged" is always false.

@type {boolean}