@Override
        public Provisioner getProvisioner() {
            return mMeshNetwork.getSelectedProvisioner();
        }
Updates the minimum security property of a Network Key. If the node was provisioned
insecurely, all network keys added to the node are marked as insecure.

@param node Provisioned mesh node.
mesh/src/main/java/no/nordicsemi/android/mesh/MeshManagerApi.java