title: Leaflet.js with OneMap: Marker and Polygon Issue
body: <p>I am using <a href="https://cdn.onemap.sg/leaflet/onemap-leaflet.js" rel="nofollow noreferrer">onemap leaflet</a> library to use <code>leaflet.js</code> with <code>onemap</code></p>
  
  <p>I am able to plot <code>Singapore map</code> in a SAPUI5 flexbox control. However, marker and polygon are not visible on the map. There is no error while adding a polygon but it does not appear on map. I have used following code to add polygon:</p>
  
  <pre><code>var latlngs = [
      [103.908057506263, 1.30981613450459],
      [103.908215431086, 1.30910851741726],
      [103.908429273653, 1.30850269384475],
      [103.908535156551, 1.30825745789562]
  ];
  var polygon = L.polygon(latlngs, {
      color: 'red'
  });
  
  polygon.addTo(map);
  </code></pre>
  
  <p>While adding a marker, I am getting following error:</p>
  
  <blockquote>
    <p>Couldn't autodetect L.Icon.Default.imagePath, set it manually.</p>
  </blockquote>
  
  <p>I need to draw polygon and show some markers.
  Please help.</p>