pub trait ArrayLike<T, E: Error> {
    fn flush(&mut self) -> Result<(), E>;
    fn get(&self, index: usize) -> Result<Option<T>, E>;
    fn is_empty(&self) -> Result<bool, E>;
    fn len(&self) -> Result<usize, E>;
    fn position(&self, item: &T) -> Result<Option<usize>, E>;
    fn push(&mut self, item: T) -> Result<usize, E>;
}

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