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- all parameters are final (Dan)
- in a interface (intellij default warnings incl. global fixes)
- method signatures without public and or abstract
- inner classes without public and static
- no multiple empty lines?
- last line empty?
- WIP: rules about character cases
- https://google.github.io/styleguide/javaguide.html#s5.1-identifier-names has good rules incl. examples
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