@Override
    public <T> void clearProperty(String namespace, String propertyName, IAsyncResultHandler<Void> handler) {
        QName qname = new QName(namespace, propertyName);
        try {
            getCache().remove(qname);
            handler.handle(AsyncResultImpl.create((Void)null));
        } catch (Exception e) {
            handler.handle(AsyncResultImpl.<Void>create(e));
        }
    }
@see io.apiman.gateway.engine.components.ISharedStateComponent#clearProperty(java.lang.String, java.lang.String, io.apiman.gateway.engine.async.IAsyncResultHandler)
gateway/engine/ispn/src/main/java/io/apiman/gateway/engine/ispn/InfinispanSharedStateComponent.java