Appium via webdriverio: driver.compareImages is not a function

Hey there, I’m having a perplexing problem when using the wdio appium service and trying to use the compareImages function.

Every time I attempt to make a call to that function the result is: driver.compareImages is not a function

I’ve forked the appium boilerplate and added some scripts that will illustrate this issue:

Anybody able to help? The documentation sure does make it seem like I ought to be able to call compareImages as a driver command without any extra imports, and all the other appium functions are working.

Well this is embarassing:

I’m using wdio 5.x so…that would be why. Carry on.