{"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"(_,"}]}
            (_, Some(init)) => {
            (Some(ty), _) => (None, Some(ty.span)), // Bias towards the explicit user type.
                (Some(init), Some(init.span.find_ancestor_inside(decl.span).unwrap_or(init.span)))