Assign NSDictionary to a global NSMUtableDictionary in swift
<p>I am getting a JSON <code>NSDictionary</code>in this way</p>

<pre><code>guard let json = try NSJSONSerialization.JSONObjectWithData(data, options: []) as? NSDictionary else {
                throw JSONError.ConversionFailed
</code></pre>

<p>What I want to do now is, create an empty <code>NSMutableDictionary</code> in globally and assign this <code>json</code> to that global <code>NSMutableDictionary</code>. How can I do this in swift? Please help me.</p>