private final ConcurrentMap<String, WeakReference<ClassLoader>> packageNameToClassLoader = new ConcurrentHashMap<>();
private final ConcurrentMap<SourceIdentifier, YangModuleInfo> sourceIdentifierToModuleInfo = new ConcurrentHashMap<>();
private final ConcurrentMap<String, WeakReference<ClassLoader>> packageNameToClassLoader = new ConcurrentHashMap<>();
private final ConcurrentMap<SourceIdentifier, YangModuleInfo> sourceIdentifierToModuleInfo = new ConcurrentHashMap<>();