@Override
        public NetworkKeysConfig build() {
            return new NetworkKeysConfig(this);
        }
Constructs ExportSome to export only a selected number of network keys when exporting a mesh network.

@param keys List of Network Keys to export.
@throws IllegalArgumentException if the list does not contain at least one network key.
mesh/src/main/java/no/nordicsemi/android/mesh/NetworkKeysConfig.java