{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
    let &ty::Tuple(component_types) = tuple_type.kind() else {
    let tuple_type = unique_type_id.expect_ty();
        bug!("build_tuple_type_di_node() called with non-tuple-type: {:?}", tuple_type)