152     static ONCE: OnceCell<u32> = OnceCell::const_new();  in get_or_init()  constant
155         let handle1 = rt.spawn(async { ONCE.get_or_init(func1).await });  in get_or_init()
156         let handle2 = rt.spawn(async { ONCE.get_or_init(func2).await });  in get_or_init()
176     static ONCE: OnceCell<u32> = OnceCell::const_new();  in get_or_init_panic()  constant
181         let handle1 = rt.spawn(async { ONCE.get_or_init(func1).await });  in get_or_init_panic()
182         let handle2 = rt.spawn(async { ONCE.get_or_init(func_panic).await });  in get_or_init_panic()
201     static ONCE: OnceCell<u32> = OnceCell::const_new();  in set_and_get()  variable
204         let _ = rt.spawn(async { ONCE.set(5) }).await;  in set_and_get()
205         let value = ONCE.get().unwrap();  in set_and_get()
212     static ONCE: OnceCell<u32> = OnceCell::const_new();  in get_uninit()  constant
213     let uninit = ONCE.get();  in get_uninit()
219     static ONCE: OnceCell<u32> = OnceCell::const_new();  in set_twice()  variable
221     let first = ONCE.set(5);  in set_twice()
223     let second = ONCE.set(6);  in set_twice()
234     static ONCE: OnceCell<u32> = OnceCell::const_new();  in set_while_initializing()  constant
239         let handle1 = rt.spawn(async { ONCE.get_or_init(sleep_and_set).await });  in set_while_initializing()
240         let handle2 = rt.spawn(async { advance_time_and_set(&ONCE, 10).await });  in set_while_initializing()
260     static ONCE: OnceCell<u32> = OnceCell::const_new();  in get_or_try_init()  variable
263         let handle1 = rt.spawn(async { ONCE.get_or_try_init(func_err).await });  in get_or_try_init()
264         let handle2 = rt.spawn(async { ONCE.get_or_try_init(func_ok).await });  in get_or_try_init()