 a new instance wrapping the passed value.<a name="line.41"></a>
<span class="sourceLineNo">042</span>     * @param w0 wrapper for nested value - should not be {@code null}<a name="line.42"></a>
<span class="sourceLineNo">043</span>     * @param w1 wrapper for nested value - should not be {@code null}<a name="line.43"></a>
<span class="sourceLineNo">044</span>     * @param v value to wrap - should not be {@code null}<a name="line.44"></a>
<span class="sourceLineNo">045</span>     */<a name="line.45"></a>
<s