title: postman: changing pre-request script dyncamically during a collection run
body: <p>There are certain functions I would like to run as pre-request script for certain requests and not others.I would like to do this without having to repeat the code for all requests using the UI, but in one place - maybe the pre-request script for the collection. Does the sandbox allow access to the runtime, so that I can maybe defined this as the pre-request script of the first request.</p>
  <p>something like <code>currentRun.collection['someRequest'].pre = () =&gt; {console.log(&quot;hello world!&quot;)}</code></p>