@SuppressWarnings("RedundantCollectionOperation")
    protected void removeBoundAppKeyIndex(final int appKeyIndex) {
        if (mBoundAppKeyIndexes.contains(appKeyIndex)) {
            final int position = mBoundAppKeyIndexes.indexOf(appKeyIndex);
            mBoundAppKeyIndexes.remove(position);
        }
    }
Returns bound appkey indexes for this model
mesh/src/main/java/no/nordicsemi/android/mesh/transport/MeshModel.java