Method borrow_first

rust/src/node.rs:470–475

Borrow the first key-value pair from this leaf (used when this is the right sibling)

(&mut self)

    /// Borrow the first key-value pair from this leaf (used when this is the right sibling)
    pub fn borrow_first(&mut self) -> Option<(K, V)> {
        if self.keys.is_empty() || !self.can_donate() {
            return None;
        }
        Some((self.keys.remove(0), self.values.remove(0)))
    }

    /// Accept a borrowed key-value pair at the beginning (from left sibling)
    pub fn accept_from_left(&mut self, key: K, value: V) {