Fix IDE warnings and make some methods static

Julien LepillerSat Jun 06 19:33:58+0200 2020

7f932b9

nani/app/gradle/wrapper
namelast commitdate
gradle-wrapper.jarInitial commitSat Apr 06 13:19:46+0200 2019
gradle-wrapper.propertiesIDE updateSat Jun 06 05:09:22+0200 2020