title: how to toggle react-navigation drawer
body: <p>I am using react-navigation <a href="https://reactnavigation.org/" rel="nofollow noreferrer">https://reactnavigation.org/</a> for my first react-native project. I would like to toggle my drawer (open &amp; close), but I have no idea how I can achieve this. I've been looking at the documentation from reactnavigation.org, but can't really find any hints.</p>