@Override
    public boolean equals(@Nullable Object object) {
      assertTrue(Thread.holdsLock(mutex));
      return super.equals(object);
    }

    @Override
    public K getKey() {
      assertTrue(Thread.holdsLock(mutex));
      return super.getKey();
    }

    @Override
    public V getValue() {
      assertTrue(Thread.holdsLock(mutex));
      return super.getValue();
    }

    @Override

    throw AssertionError("Thread ${Thread.currentThread().name} MUST hold lock on $this")
  }
}

@Suppress("NOTHING_TO_INLINE")
internal inline fun Any.assertThreadHoldsLock() {
  if (assertionsEnabled && !Thread.holdsLock(this)) {
    throw AssertionError("Thread ${Thread.currentThread().name} MUST hold lock on $this")
  }
}

@Suppress("NOTHING_TO_INLINE")
internal inline fun ReentrantLock.assertNotHeld() {