Postman programmatically set collection variables in pre-request script : <p>Currently, it is possible to set and get variables from the <code>global</code> and <code>environment</code> scope, as well as the generic <code>variable</code> in a pre-request script.  However, the documentation is not clear if it is possible to programmaticaly set <code>collection</code> scoped variables.  </p>

<p>For example</p>

<pre><code>pm.environment.set("timestamp", timestamp);  //acceptable
pm.global.set("signature", hash);  //acceptable
pm.variable.set("signature", hash); //acceptable
pm.collection.set("signature", hash); //not possible?
</code></pre>

<p>Is this possible?</p>
