{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
    let Param { hir_id, pat, ty_span: _, span: _ } = param;
pub fn walk_param<'v, V: Visitor<'v>>(visitor: &mut V, param: &'v Param<'v>) -> V::Result {
    try_visit!(visitor.visit_id(*hir_id));