ui/src/main/java/ucar/nc2/ui/image/ScalablePicture.java
public void stopLoadingExcept(URL url) {
    if (sourcePicture != null) {
      boolean isCurrentlyLoading = sourcePicture.stopLoadingExcept(url);
      if (!isCurrentlyLoading) {
        // sourcePicture.removeListener( this );
      }
      PictureCache.stopBackgroundLoadingExcept(url);
    }
  }
public void stopLoadingExcept(URL url) {
    if (sourcePicture != null) {
      boolean isCurrentlyLoading = sourcePicture.stopLoadingExcept(url);
      if (!isCurrentlyLoading) {
        // sourcePicture.removeListener( this );
      }
      PictureCache.stopBackgroundLoadingExcept(url);
    }
  }
stops all picture loading except if the Url we desire is being loaded

@param url The URL of the image which is to be loaded.