code: @SafeVarargs
    public static <KType> ObjectIdentityHashSet<KType> from(KType... elements) {
      final ObjectIdentityHashSet<KType> set = new ObjectIdentityHashSet<KType>(elements.length);
      set.addAll(elements);
      return set;
    }
docs: Create a set from a variable number of arguments or an array of
  <code>KType</code>. The elements are copied from the argument to the
  internal buffer.