Same pattern of cell value defns in both tables and sheet cells
Same pattern of cell value defns in both tables and sheet cells

While for sheet cells we may have been able to use a hidden property to indicate a function should be computed, for table cells there is no per-cell object, so we have to use something else to carry that info (and getters, being lazy and allowing self-references, are a natural fit).

chrispsn/mesh,chrispsn/mesh