title: Google Maps iOS Remove Polylines
body: <p>Is it possible to remove all Polylines without removing other objects? </p>
  
  <p><code>[mapView clear];</code> removes everything including markers</p>
  
  <p>I also tried the following but it didn't work either..</p>
  
  <pre><code>for (GMSPolyline __strong *polyline in self.mapView.subviews) {
      polyline = nil;
  }
  </code></pre>
  
  <p>Thanks in advance</p>
  
  <p>PS : I am using Google Maps SDK for iOS version: 1.7.2.7908</p>