 // MARK: - Associated Object
 private var lastURLkey: Void?
 public extension UIImageView {
-    /// Get the image URL binded to this image view. You can use `kf_setImage` methods to set it.
+    /// Get the image URL binded to this image view.
     public var kf_webURL: NSURL? {
         get {
             return objc_getAssociatedObject(self, &lastURLkey) as? NSURL

    }
    
    /**
    Set an image with a URL, a place holder image, options, progress handler and completion handler.
    
    :param: URL               The URL of image.
    :param: placeholderImage  A placeholder image when retrieving the image at URL.

    }
    
    /**
    Set an image with a URL, a placaholder image and options.
    
    :param: URL              The URL of image.
    :param: placeholderImage A placeholder image when retrieving the image at URL.
