Can we get access to the L.map object to implement our own features?

I was wondering if I as a dashboard user could access the leaflet `map` object which was created by the visualization in my own javascript code somehow. My intention is to add some lines and other things which would require me to add a layer or two to the map and draw on them. Maybe I'm thinking too specific, but I don't really see any other way to change the content of the map other than having the actual object. Thanks!