nsUint32ToContentHashEntry(const KeyTypePointer key) : mValue(*key), mValOrHash(nsnull) { }
nsUint32ToContentHashEntry(const nsUint32ToContentHashEntry& toCopy) : mValue(toCopy.mValue), mValOrHash(toCopy.mValOrHash) {    NS_CONST_CAST(nsUint32ToContentHashEntry&, toCopy).mValOrHash = nsnull; NS_ERROR("Copying not supported. Fasten your seat belt."); }
    nsUint32ToContentHashEntry(const KeyTypePointer key) :      mValue(*key), mValOrHash(nsnull) { }