// The cast is safe because the callers of this method first check that the key is present.
    V oldValue = uncheckedCastNullableTToT(delegate.remove(key));
    removeFromInverseMap(oldValue);
    return oldValue;
  }

  private void removeFromInverseMap(@ParametricNullness V oldValue) {
    inverse.delegate.remove(oldValue);
  }

  // Bulk Operations

  @Override