function PropertyExtenders() {

}

	// Return instances that may provide extension properties

	// The target instance parameter is the instance to receive the

	// additional properties

PropertyExtenders.prototype.getPropertyExtenders = function(instance, targetInstance) {

	if (targetInstance.parent == instance)

		return [instance];

	return null;

}

PropertyExtenders.prototype.getExtensionSetNames = function(instance, targetInstance) {

	if (targetInstance.parent != instance)

		return null;

	var val = instance.properties.type;

	if (val == "EElement1__")

		return [ "element1" ];

	if (val == "EElement_1_")

		return [ "element2" ];

	if (val == "EElement__1")

		return [ "element3" ];

	if (val == "EElement1_1")

		return [ "element1", "element3" ];

	if (val == "EElement11_")

		return [ "element1", "element2" ];

	if (val == "EElement_11")

		return [ "element2", "element3" ];

	if (val == "EElement111")

		return [ "element1", "element2", "element3" ];

	return null;

}