Do not depend on set order (assumes object insert order is the same as the passed-in list).
Do not depend on set order (assumes object insert order is the same as the passed-in list).


Former-commit-id: 50bd7faccc2959b8d4214eff4fe3a830d296b73a
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine