- Groovy expressions: if the same expression appears in different cells, the same Groovy class is re-used.
- Groovy methods: the method to be invoked is located on the 'method' axis of the input coordinate.  This allows one Groovy 'Controller' class to have many methods, mapping it 1:1 to an n-cube.  The cells of the n-cube point to the Groovy Controller class via a url.  The same URL is used for all methods on a Groovy Controller, because the method name, is determined by matching the 'method' axis with the method name.