{"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
                let (lhs_prefix, rhs_prefix) = common_prefix(&lhs_path, &rhs_path)?;
                let rhs_path = rhs_t.path()?;
                if lhs_prefix == lhs_path && rhs_prefix == rhs_path {