use std::path::PathBuf; use memmap2::Mmap; /// Known multi-index file versions#[derive(PartialEq, Eq, Ord, PartialOrd, Debug, Hash, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]#[allow(missing_docs)]pub enum Version {    V1 = 1,} impl Default for Version {    fn default() -> Self {        Version::V1    }} /// An index into our [`File::index_names()`] array yielding the name of the index and by implication, its pack file.pub type PackIndex = u32; /// The type for referring to indices of an entry within the index file.pub type EntryIndex = u32; /// A representation of an index file for multiple packs at the same time, typically stored in a file/// named 'multi-pack-index'.pub struct File {    data: Mmap,    path: std::path::PathBuf,    version: Version,    hash_len: usize,    object_hash: git_hash::Kind,    /// The amount of pack files contained within    num_indices: u32,    num_objects: u32,     fan: [u32; 256],    index_names: Vec<PathBuf>,    lookup_ofs: usize,    offsets_ofs: usize,    large_offsets_ofs: Option<usize>,} ///pub mod write; ///mod access; ///pub mod verify; ///pub mod chunk; ///pub mod init;