{"ast_node_type":"function","tokens":[{"end":80,"kind":"keyword","start":0,"text":"r#\"fn"}]}
            r#"fn f<F>(call: F, arg: usize) where F: Fn(usize) { call(arg); }"#,
            r#"fn f<F>(call: F, arg: usize) where F: Fn(usize) { $0(call)(arg); }"#,
        );