casesUsing.lean:14:8-14:11: warning: declaration uses `sorry`
casesUsing.lean:30:8-30:11: warning: declaration uses `sorry`
casesUsing.lean:128:8-128:12: warning: declaration uses `sorry`
casesUsing.lean:137:8-137:12: warning: declaration uses `sorry`
casesUsing.lean:146:8-146:12: warning: declaration uses `sorry`