Method insert

crates/common/src/boxvec.rs:103–105

(&mut self, index: usize, element: T)

    }

    pub fn insert(&mut self, index: usize, element: T) {
        self.try_insert(index, element).unwrap()
    }

    pub fn try_insert(&mut self, index: usize, element: T) -> Result<(), CapacityError<T>> {
        if index > self.len() {