{"ast_node_type":"function","tokens":[{"end":57,"kind":"keyword","start":0,"text":"r\"fn"}]}
            r"fn f() { let res = 4 + 5 < 1 + (2 - 3); }",
            r"fn f() { let res = 1 + (2 - 3) >$0 4 + 5; }",
        )