Trait data_structure_traits::Deque
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pub trait Deque<T> { fn push_front(&mut self, _: T); fn push_back(&mut self, _: T); fn pop_front(&mut self) -> Option<T>; fn pop_back(&mut self) -> Option<T>; fn front(&self) -> Option<&T>; fn back(&self) -> Option<&T>; fn front_mut(&mut self) -> Option<&mut T>; fn back_mut(&mut self) -> Option<&mut T>; }