040000 tree 912484c8e2d62b251b39ea20e411cf3dc63e72a2	definite_assignment
040000 tree b0f0187c41dcc42d1374b72ce0fa1b4df66f9ffc	nullability
040000 tree ef2702136db66c1382974ded4323f3c1e8d8601f	reachability
040000 tree e99078c2b8bc60bce09ee11b85fac1421bfca52d	type_promotion