{"ast_node_type":"function","tokens":[{"end":60,"kind":"keyword","start":0,"text":"fn"}]}
    fn decorate_lint<'b>(self, diag: &'b mut Diag<'a, ()>) {
impl<'a, P: std::fmt::Debug> LintDiagnostic<'a, ()> for AssertLint<P> {
        diag.primary_message(match self.lint_kind {