MAPluggableAccessor and block equality

Hi, I'm toying around with MAPluggableAccessor. While I really like to introduce some kind of delegated descriptions it doesn't work that easy. I'm not really familiar with caching of the magritte descriptions. My problem is that I'm operating on a MAContainerComponent using childAt: . The children are detected by =. The MAPluggableAccessor implements equality based on the equality of the read and write accessors. But these are blocks and return false if compared. So I'm wondering what is the intended of the class. I can get it to work if I'm caching the accessor inside the component. But maybe it is supposed to work different. Norbert