code: @Override
    public <T> List<Binding<T>> bindings(Key<T> key)
    {
      BindingSet<T> set = (BindingSet) _bindingSetMap.get(key.rawClass());
  
      if (set != null) {
        return set.bindings(key);
      }
      else {
        return Collections.EMPTY_LIST;
      }
    }
docs: Returns all bindings matching a key.