8     struct Opt {  in test_safely_nest_parser()  struct
10         foo: Foo,  in test_safely_nest_parser()
30     struct Opt {  in implicit_struct_group()  struct
32         add: bool,  in implicit_struct_group()
35         source: Source,  in implicit_struct_group()
66     struct Opt {  in skip_group_avoids_duplicate_ids()  struct
68         first: Compose<Empty, Empty>,  in skip_group_avoids_duplicate_ids()
70         second: Compose<Empty, Empty>,  in skip_group_avoids_duplicate_ids()
102     struct Opt {  in helpful_panic_on_duplicate_groups()  struct
104         first: Compose<Empty, Empty>,  in helpful_panic_on_duplicate_groups()
106         second: Compose<Empty, Empty>,  in helpful_panic_on_duplicate_groups()