040000 tree fe2d3fc91500383c3f3a684cab33a627f2b1cfcd	definite_assignment
040000 tree b0f0187c41dcc42d1374b72ce0fa1b4df66f9ffc	nullability
040000 tree ad9472defcf81b6720555d22914fa57b7baf0640	reachability
040000 tree ec3a1d86f9bf4c070db685955586902dfa481555	type_promotion