close shape on polyline tool

[jasonbaik]

hi, is there anyone that knows how to invoke "completeShape()" on the polyline tool? currently i check for how many vertexes are created but can't seem to complete the polyline after 1 vertex is drawn:

map.on('draw:drawvertex', function(e) {
      if (Object.keys(e.layers._layers).length > 1) {
        // need to close polyline here
      }
});