570     pub struct Lazy<T, F = fn() -> T> {  struct
576     impl<T, F: RefUnwindSafe> RefUnwindSafe for Lazy<T, F> where OnceCell<T>: RefUnwindSafe {}  implementation
578     impl<T: fmt::Debug, F> fmt::Debug for Lazy<T, F> {  implementation
584     impl<T, F> Lazy<T, F> {  impl
590         /// use once_cell::unsync::Lazy;
615     impl<T, F: FnOnce() -> T> Lazy<T, F> {  implementation
638     impl<T, F: FnOnce() -> T> Deref for Lazy<T, F> {  implementation
645     impl<T, F: FnOnce() -> T> DerefMut for Lazy<T, F> {  implementation
652     impl<T: Default> Default for Lazy<T> {  implementation
966     pub struct Lazy<T, F = fn() -> T> {  struct
967         cell: OnceCell<T>,
968         init: Cell<Option<F>>,
971     impl<T: fmt::Debug, F> fmt::Debug for Lazy<T, F> {  implementation
982     unsafe impl<T, F: Send> Sync for Lazy<T, F> where OnceCell<T>: Sync {}  implementation
986     impl<T, F: RefUnwindSafe> RefUnwindSafe for Lazy<T, F> where OnceCell<T>: RefUnwindSafe {}  implementation
988     impl<T, F> Lazy<T, F> {  impl
1007     impl<T, F: FnOnce() -> T> Lazy<T, F> {  implementation
1029     impl<T, F: FnOnce() -> T> Deref for Lazy<T, F> {  implementation
1036     impl<T, F: FnOnce() -> T> DerefMut for Lazy<T, F> {  implementation
1043     impl<T: Default> Default for Lazy<T> {  implementation