* MapSplitter mapSplitter = outerSplitter.withKeyValueSeparator(Splitter.on("->"));
   * Map<String, String> result = mapSplitter.split(toSplit);
   * assertThat(result).isEqualTo(ImmutableMap.of("x ", " y", "z", " a"));
   * }
   *
   * @since 10.0
   */
  public MapSplitter withKeyValueSeparator(Splitter keyValueSplitter) {
    return new MapSplitter(this, keyValueSplitter);
  }

  /**

   * MapSplitter mapSplitter = outerSplitter.withKeyValueSeparator(Splitter.on("->"));
   * Map<String, String> result = mapSplitter.split(toSplit);
   * assertThat(result).isEqualTo(ImmutableMap.of("x ", " y", "z", " a"));
   * }
   *
   * @since 10.0
   */
  public MapSplitter withKeyValueSeparator(Splitter keyValueSplitter) {
    return new MapSplitter(this, keyValueSplitter);
  }

  /**

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.base.Splitter.MapSplitter;
import com.google.common.collect.ImmutableMap;
import com.google.common.testing.NullPointerTester;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;