How do you apply a gradient to a line shape like a NRoutableConnector?(i.e. two color gradient, applied to the entire line one color from one end, and ending in a different color on the other end)

I played around with the Nevron examples application and was able to apply a gradient fill (Fill Style) to a box shape; however, when I applied it to a line shape, it didn't seem to do anything. The line would only seemed to be taking into consideration the stroke style settings.

Thank you!