ameter. */<a name="line.50"></a>
<span class="sourceLineNo">051</span>    protected final Wrapper&lt;T2&gt; wrapper2;<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span>    /** Wrapper for fourth parameter. */<a name="line.53"></a>
<span class="sourceLineNo">054</span>    protected final Wrapper&lt;T3&gt; wrapper3;<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>    /** 