ProGuard configuration for Guava with obfuscation and optimization

Question

Looking for a ProGuard configuration for Guava that will obfuscate and optimize, as the default one that is provided on the website does not.

Not only that I cannot

Answer 1

For Guava 20.0 you need to add also:

# Guava 20.0
-dontwarn com.google.errorprone.annotations.CanIgnoreReturnValue
-dontwarn com.google.errorprone.annotations.concurrent.LazyInit
-dontwarn com.google.errorprone.annotations.ForOverride