040000 tree 031c75040f3974d31eac4b321360a9b5eec1b8c0	nnbd_opted_in
040000 tree c85c63810996c43ec8f5077dd56f6614f771ba14	nnbd_opted_out
040000 tree 285d5782c398093c1f20c477c7231cf3a12e0235	spawn_hybrid