Tuple Fields
0: Option<usize>
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for MapStart
impl Send for MapStart
impl Sync for MapStart
impl Unpin for MapStart
impl UnwindSafe for MapStart
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more