Different parts of the code currently use different utilities to validate the arguments.
- Some parts use Guava (checkNotNull, checkArgument) - Other parts use Validate from Apache commons-lang(3). How about we use one consistently, at least for all new code additions? In choosing one, I have a slight bias towards Guava, which has more/nicer methods and seems more popular in other projects (I have no source to back this up, it is a gut feeling from what I have seen in other projects that I looked into) Greetings, Stephan
