return ((TestMultimapGenerator<K, V, M>) multimapGenerator.getInnerGenerator())
          .createValueArray(length);
    }

    @Override
    public SampleElements<K> sampleKeys() {
      return ((TestMultimapGenerator<K, V, M>) multimapGenerator.getInnerGenerator()).sampleKeys();
    }

    @Override
    public SampleElements<V> sampleValues() {

import com.google.common.collect.testing.google.SetMultimapTestSuiteBuilder;
import com.google.common.collect.testing.google.TestListMultimapGenerator;
import com.google.common.collect.testing.google.TestMultimapGenerator;
import com.google.common.collect.testing.google.TestSetMultimapGenerator;
import com.google.common.collect.testing.google.TestStringListMultimapGenerator;