public String getInterfaceMethodrefType(int index) {
        InterfaceMethodrefInfo minfo
            = (InterfaceMethodrefInfo)getItem(index);
        if (minfo == null)
            return null;
        else {
            NameAndTypeInfo n
                = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
            if(n == null)
                return null;
            else
                return getUtf8Info(n.typeDescriptor);
        }
    }