@Test
  public void endCacheWriterCallIncrementsCacheWriterCallsCompleted() {
    cachePerfStats.endCacheWriterCall(0);

    assertThat(statistics.getLong(cacheWriterCallsCompletedId)).isEqualTo(1);
  }
Characterization test: Note that the only way to increment {@code cacheWriterCallsCompleted} is
to invoke {@code endCacheWriterCall}.
geode-core/src/test/java/org/apache/geode/internal/cache/CachePerfStatsTest.java