Declares a rule, which applies in every world, and returns it: identified by that value, labeled by its binding. Throws
if it matches on a key that isn't a registered component, derives a component that isn't derived, or derives in a
cycle through a negation.
Declares a rule, which applies in every world, and returns it: identified by that value, labeled by its binding. Throws if it matches on a key that isn't a registered component, derives a component that isn't derived, or derives in a cycle through a negation.