class PersistedChronicleHashResources extends ChronicleHashResources {

    private File file;

    public PersistedChronicleHashResources(File file) {
        this.file = file;
        OS.memory().storeFence(); // Emulate final semantics of the file field
    }

    @Override
    void releaseMemoryResource(MemoryResource mapping) throws IOException {
        OS.unmap(mapping.address, mapping.size);
    }

    @Override
    Throwable releaseExtraSystemResources() {<FILL_FUNCTION_BODY>}
}

        if (file == null)
            return null;
        Throwable thrown = null;
        try {
            CanonicalRandomAccessFiles.release(file);
            file = null;
        } catch (Throwable t) {
            thrown = t;
        }
        return thrown;
    
<methods>public non-sealed void <init>() ,public final boolean releaseManually() ,public void run() ,public final void setChronicleHashIdentityString(java.lang.String) <variables>private static final int COMPLETELY_CLOSED,private static final int OPEN,private static final int PARTIALLY_CLOSED,private java.lang.String chronicleHashIdentityString,private List<java.io.Closeable> closeables,private List<WeakReference<net.openhft.chronicle.hash.impl.ContextHolder>> contexts,private List<net.openhft.chronicle.hash.impl.MemoryResource> memoryResources,private volatile int state