code: private <T> BindingAmp<T> findBinding(Key<T> key)
    {
      BindingSet<T> set = (BindingSet) _bindingSetMap.get(key.rawClass());
  
      if (set != null) {
        BindingAmp<T> binding = set.find(key);
  
        if (binding != null) {
          return binding;
        }
      }
  
      return null;
    }
docs: Finds a producer for the given target type.