code: @CanIgnoreReturnValue
    public Ordered containsAtLeast(@NullableDecl Object k0, @NullableDecl Object v0, Object... rest) {
      return containsAtLeastEntriesIn(accumulateMultimap(k0, v0, rest));
    }
docs: Fails if the multimap does not contain at least the given key/value pairs.
  
  <p><b>Warning:</b> the use of varargs means that we cannot guarantee an equal number of
  key/value pairs at compile time. Please make sure you provide varargs in key/value pairs!