How to specify the root namespace for a variable when you are in a namespace
<p>It works when I do:</p>

<pre><code>namespace UnitTesting {class UnitTest_1;}

namespace NLa
{
    class Search
    {
       friend class UnitTesting::UnitTest_1;
    }
}
</code></pre>

<p>But what if <code>class UnitTest_1</code> is not in a namespace ?</p>
