title: Find Leaflet map object after initialisation
body: <p>I'm trying to change some things on a map that is already initialised by another script, using the <a href="http://leafletjs.com/" rel="noreferrer">Leaflet library</a>. This other script did not store the map-object in a global variable, or in any other location I can access with my script. So currently there is a map on my page, but I don't have the map object.</p>
  
  <p>What I'd like to do is to retrieve the object of an already-initialised map, to make changes to it. For example, if there'd exist a function <code>L.getMap('myID')</code> I'd like to use such a method to retrieve the map object linked to the container <code>myID</code>.</p>
  
  <p>TL;DR: Is there a way to get a map object of an already-initialised leaflet map, using the id of the container?</p>