/// Returned when using various methods on a [`Tree`]#[derive(thiserror::Error, Debug)]pub enum Error {    #[error(        "Pack offsets must only increment. The previous pack offset was {last_pack_offset}, the current one is {pack_offset}"    )]    InvariantIncreasingPackOffset {        /// The last seen pack offset        last_pack_offset: crate::data::Offset,        /// The invariant violating offset        pack_offset: crate::data::Offset,    },} ///pub mod traverse; ///pub mod from_offsets; /// Tree datastructure// kept in separate module to encapsulate unsafety (it has field invariants)mod tree; pub use tree::{Item, Tree};