{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"ExprKind::Assign(lhs,"}]}
                ExprKind::Assign(lhs, rhs, span) =>
                    visit_visitable!($($mut)? vis, expr, span),
                    visit_visitable!($($mut)? vis, lhs, rhs, span),