assertEquals("{a=[a1, a4, a4], b=[b6]}", transformed.toString());
  }

  @J2ktIncompatible // Synchronized
  public void testSynchronizedMultimapSampleCodeCompilation() {
    // Extra indirection for J2KT, to avoid error: not enough information to infer type variable K
    this.<@Nullable Object, @Nullable Object>genericTestSynchronizedMultimapSampleCodeCompilation();
  }