public static JvmMetrics initSingleton(String processName, String sessionId) {
    return Singleton.INSTANCE.init(processName, sessionId);
  }
@Test
  public void testJvmMetricsSingletonWithSameProcessName() {
    JvmMetrics jvmMetrics1 = org.apache.hadoop.metrics2.source.JvmMetrics
        .initSingleton("test", null);
    JvmMetrics jvmMetrics2 = org.apache.hadoop.metrics2.source.JvmMetrics
        .initSingleton("test", null);
    Assert.assertEquals("initSingleton should return the singleton instance",
        jvmMetrics1, jvmMetrics2);
  }