/**
   * Returns the {@link Method} instance for {@link #testMergeNullValue()} so that tests of {@link
   * Hashtable} can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()}.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getMergeNullValueMethod() {
    return Helpers.getMethod(MapMergeTester.class, "testMergeNullValue");
  }

            .put(Range.closedOpen(1, 2), 3)
            .put(Range.closedOpen(2, 3), 5)
            .build(),
        rangeMap.asMapOfRanges());
  }

  public void testMergeNullValue() {
    // {[1..2): 1, [3, 4): 2}
    RangeMap<Integer, Integer> rangeMap = TreeRangeMap.create();
    rangeMap.put(Range.closedOpen(1, 2), 1);
    rangeMap.put(Range.closedOpen(3, 4), 2);