non-negative
non-negative


Former-commit-id: f71ca5338c28494f4cfd4241e480d2670498f11b
Former-commit-id: a81dea5ad37c13fa1f470fbb1e69f25ad3379a32
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy