IPropertyTester result;
// handle extenders associated with this type extender
for (int i= 0; i < fExtenders.length; i++) {
IPropertyTester extender= fExtenders[i];
if (extender == null || !extender.handles(namespace, method))
continue;
if (extender.isInstantiated()) {
// There is no need to check for an active plug-in here. If a plug-in
// gets uninstalled we receive an registry event which will flush the whole
// type extender cache and will reinstantiate the testers. However Bundle#stop