{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
    let Pat { hir_id, kind, span, default_binding_modes: _ } = pattern;
pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat<'v>) -> V::Result {
    try_visit!(visitor.visit_id(*hir_id));