title: Use of undeclared identifier 'AIRGoogleMapOverlay' react-native-maps
body: <p>I have done exactly the same installation as described in this link for IOS
  <a href="https://github.com/react-community/react-native-maps/blob/master/docs/installation.md" rel="nofollow noreferrer">https://github.com/react-community/react-native-maps/blob/master/docs/installation.md</a>  </p>
  
  <p>But for some reason I am getting these errors:</p>
  
  <ol>
  <li>Use of undeclared identifier 'AIRGoogleMapOverlay'</li>
  <li>Use of undeclared identifier 'overlay'</li>
  <li>Use of undeclared identifier 'overlay'  </li>
  </ol>
  
  <p>The code:
      #import "AIRGoogleMapOverlayManager.h"
      #import "AIRGoogleMapOverlay.h"</p>
  
  <pre><code>@interface AIRGoogleMapOverlayManager()
  
  @end
  
  @implementation AIRGoogleMapOverlayManager
  
  RCT_EXPORT_MODULE()
  
  (UIView *)view
  {
    AIRGoogleMapOverlay *overlay = [AIRGoogleMapOverlay new];
    overlay.bridge = self.bridge;
    return overlay;
  }
  
  RCT_REMAP_VIEW_PROPERTY(bounds, boundsRect, NSArray)
  RCT_REMAP_VIEW_PROPERTY(image, imageSrc, NSString)
  
  @end
  </code></pre>