At the moment merged context merges contexts
according to order in which they are specified.
The higher layers and their content have
precedence over the lower ones.
Consider to add explicit declarative support for
overriding of bindings/attributes/contexts and
merging them according to it instead of order.
The expected advantage would be clear information
that somebody overrides something. At the moment
this is defined by module dependencies and it is
not obvious to module writers. Also it could
improve diagnostic of conflicts and potential
Reassigning to new module owner jskrivanek.
Registry module is obsolete.