I have just updated my version of appium java client from 3.4.1 to 7.0.0 and my wait.until are now broken.
I have tried googling for some examples of how to use waits in this new version, but to no avail. Can anyone provide a short example of using wait.until in this version of the java client?
EDIT: I fixed this by importing
import java.util.function.Function;
and changing the source from 7 to 8.