14     struct Opt {  in unique_flag()  struct
16         alice: bool,  in unique_flag()
46     struct Opt {  in multiple_flag()  struct
48         alice: u64,  in multiple_flag()
50         bob: u8,  in multiple_flag()
86     struct Opt {  in non_bool_flags()  struct
88         alice: std::sync::atomic::AtomicBool,  in non_bool_flags()
90         bob: std::sync::atomic::AtomicBool,  in non_bool_flags()
113     struct Opt {  in combined_flags()  struct
115         alice: bool,  in combined_flags()
117         bob: u64,  in combined_flags()