/// Remove a plank from this row
    pub fn pop(&mut self, ms: &mut MaterialStorage) {
        // Remove the plank
        if let Some(plank) = self.planks.pop() {
            ms.store_used(plank);
            // Update the row coverage
            self.coverage -= plank.length();
        }
        // Remove the cut
        if let Some(cut) = self.cut_coordinates.pop() {
            println!("Removed cut at {}", cut.coordinate);
        }
    }