Added a debug utility [skip CI]
Added a debug utility [skip CI]


Former-commit-id: b4fe4b5594a8ab91848d379b2f97156f88604d8e [formerly de9b084e7a70a614db2e91d16cff4fe2b6909e20]
Former-commit-id: eaf667101bbb51aee68aa15fdac8280ab96efa8c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine