Beginner: getAudioProcessor() undefined

I'm totally new to JUCE but certainly in the for the long haul. 

I'm trying to go through the Redwoods Audio tutorial, but with the getAudioProcessor() I get an error in the IDE:

Error: identifier "getAudioProcessor" is undefined.

I'm attaching a screen capture of the error.  If anyone could help me with this, it'd be very appreciated.  I'm trying to get on my feet with JUCE.

You're not giving much for us to work with here, can you provide more code?