public boolean isExist(final int modelId) {
        for (Map.Entry<Integer, Element> elementEntry : mElements.entrySet()) {
            final Element element = elementEntry.getValue();
            for (Map.Entry<Integer, MeshModel> modelEntry : element.getMeshModels().entrySet()) {
                final MeshModel model = modelEntry.getValue();
                if (model != null && model.getModelId() == modelId) {
                    return true;
                }
            }
        }
        return false;
    }
Sets the unbind app key data from the {@link ConfigModelAppStatus}

@param configModelAppStatus ConfigModelAppStatus containing the unbound app key information
mesh/src/main/java/no/nordicsemi/android/mesh/transport/ProvisionedMeshNode.java