title: I'm trying to plot a polygon with a hover text on google map
body: <p>I'm plotting a polygon with hover text , but its showing polygon is not serializable into JSON.</p>
  
  <pre><code>hover_text1="this is simple"
  l=gmaps.MarkerOptions(hover_text=hover_text1)
  drawing = gmaps.drawing_layer(
   features=[map_polygon,l] 
   # show_controls=False
   )  
  </code></pre>
  
  <p>Expected output is polygon with hover text ,but its showing error: </p>
  
  <blockquote>
    <p>TypeError: Object of type Polygon is not JSON serializable</p>
  </blockquote>