Method reserve

perro_source/runtime_project/perro_runtime/src/cns/node_arena.rs:143–148

Reserve slots for additional node inserts.

(&mut self, additional: usize)

                tags_hash(&node.tags),
                node.parent,
                node.node_type(),
                self.old_children_len != node.children.len()
                    || self.old_children_hash != children_hash(&node.children),
            )
        };

        if self.old_name_hash != new_name_hash {
            self.arena.unindex_name_hash(self.old_name_hash, self.id);
            if !name_empty {