e layer supports.</p>
<p>The list elements must be functions to apply to the values in the legend.</p>
    <h2 class="hasAnchor" id="id"><a class="anchor" href="#id"></a>id</h2>

    


<p>The <code>id</code> is returned to your R session from an interactive shiny environment
by observing layer clicks. This is useful for returning the data.frame row relating to the
cliked shape.</p>
<p>From within a shiny server you would typically use <code> observeEvent({input$map_arc_click})</code>,
where 'map' is the ma