{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
    let &ty::Adt(enum_adt_def, _) = enum_type.kind() else {
    let enum_type = unique_type_id.expect_ty();
        bug!("build_enum_type_di_node() called with non-enum type: `{:?}`", enum_type)