title: R leaflet zoomControl option
body: <p>I'm building a map tool in R using leaflet, and I would like to restrict the zoom to a certain area, but the <code>setMaxBounds</code> function doesn't seem to have any effect.</p>
  
  <pre class="lang-r prettyprint-override"><code>library(dplyr)
  library(leaflet)
  library(tigris)
  
  ohio_map &lt;- leaflet(counties('OH', cb = TRUE)) %&gt;%
    addProviderTiles("CartoDB.Positron") %&gt;%
    addPolygons(weight = .3,
                color = "#229922",
                layerId = ~NAME) %&gt;%
    setMaxBounds(lng1 = -84.800,
                 lat1 = 42.000,
                 lng2 = -80.500,
                 lat2 = 38.400)
  ohio_map
  </code></pre>
  
  <p>This shows the right area of the map, but doesn't prevent zooming out.</p>
  
  <p>It would be even better to remove the zoom controls altogether, so that I could replace the navigation with something more suitable to the application at hand. I found a <a href="http://leafletjs.com/reference-1.0.0.html#control-zoom" rel="noreferrer">zoomControl</a> option, but haven't been able to figure out where to put that in R to get it to work.</p>
  
  <hr>
  
  <p>EDIT: As pointed out by @Symbolix, setMaxBounds really is something different than what I'm looking for. I really just want to disable zooming altogether, and remove the controls. The <a href="http://leafletjs.com/reference-1.0.0.html#control-zoom" rel="noreferrer">zoomControl</a> option described in the leaflet JavaScript API docs appears to be what I want, but I cannot find that option in the R package.</p>