delete[] (PRUnichar*)(mValue);
nsMemory::Free(mValue);
    void ReleaseValue() {        if (IsStringValue()) {            delete[] (PRUnichar*)(mValue);        }        else {            nsIAtom* atom = (nsIAtom*)(PRWord(mValue) & ~PRWord(kTypeMask));            NS_RELEASE(atom);        }    }