pub trait Stack<T> {
// Required methods
fn push(&mut self, value: T);
fn pop(&mut self) -> T;
fn peek(&self) -> T;
fn peek_down_by(&self, n: u8) -> T;
}
pub trait Stack<T> {
// Required methods
fn push(&mut self, value: T);
fn pop(&mut self) -> T;
fn peek(&self) -> T;
fn peek_down_by(&self, n: u8) -> T;
}