Yeah weakmap and weakset basically do the opposite of what I want. The keys are weakly held rather than the values, which does no good for an ORM cache. One can

Yeah weakmap and weakset basically do the opposite of what I want. The keys are weakly held rather than the values, which does no good for an ORM cache. One cannot even iterate over the keyset in a weakmap (so you can't do a lousy o(n) lookup version of what I want.