code: func RegisterFitPredicate(name string, predicate predicates.FitPredicate) string {
  	return RegisterFitPredicateFactory(name, func(PluginFactoryArgs) predicates.FitPredicate { return predicate })
  }
docs: // RegisterFitPredicate registers a fit predicate with the algorithm
  // registry. Returns the name with which the predicate was registered.