Method get_level_mut

battlecode-engine/src/research.rs:91–97

(&mut self, branch: &Branch)

    }

    fn get_level_mut(&mut self, branch: &Branch) -> &mut Level {
        if let Some(level) = self.level.get_mut(branch) {
            level
        } else {
            unreachable!();
        }
    }

    fn get_maybe_level(&mut self, branch: &Branch) -> Level {
        if let Some(level) = self.maybe_level.get(branch) {