string containing the UTF-8 representation of the integer. Values outside
the range of valid Unicode code points are converted to <code>"\uFFFD"</code>.

<pre>
string('a')       // "a"
string(-1)        // "\ufffd" == "\xef\xbf\xbd"
string(0xf8)      // "\u00f8" == "ø" == "\xc3\xb8"
type MyString string
MyString(0x65e5)  // "\u65e5" == "日" == "\xe6\x97\xa5"
</pre>
</li>

    static final int ATTR_COMPRESSED       = 0x800;
    static final int ATTR_NORMAL           = 0x080;
    static final int ATTR_TEMPORARY        = 0x100;

    static final int ATTR_GET_MASK = 0x7FFF; /* orig 0x7fff */
    static final int ATTR_SET_MASK = 0x30A7; /* orig 0x0027 */

    static final int DEFAULT_ATTR_EXPIRATION_PERIOD = 5000;

    static final int HASH_DOT     = ".".hashCode();