title: How Do I Use RefreshIndicator with a FutureBuilder in Flutter?
body: <p>I'm trying to figure out a way to indicate to a surrounding class when the <code>FutureBuilder</code> is done loading. <code>RefreshIndicator</code> takes a <code>Future</code> as a parameter and stops showing the refresh indicator when the <code>Future</code> completes. I don't have access to the exact same <code>Future</code> variable that's being passed to the <code>FutureBuilder</code>, especially when these are in two separate classes, unless I can pass a reference to one and when it completes in the other class, I'll know...</p>