4 N2[label="stmt fn inner(x: isize) -> isize { x + x }"];
5 N3[label="expr inner"];
6 N4[label="expr inner"];
8 N6[label="expr inner(18)"];
9 N7[label="expr inner(inner(18))"];
10 N8[label="stmt inner(inner(18));"];
11 N9[label="block {\l fn inner(x: isize) -> isize { x + x }\l inner(inner(18));\l}\l"];
12 N10[label="expr {\l fn inner(x: isize) -> isize { x + x }\l inner(inner(18));\l}\l"];