//! An object database delegating object access to multiple contained object databasesuse crate::{loose, pack}; ///pub mod object;pub use object::Object; ///pub mod init;///pub mod locate;mod write; /// An object database with tiered lookup in Alternates, loose objects and packs./// This is a typical git database as used in git repositories.pub struct Db {    /// A loose object database into which new objects are written    pub loose: loose::Db,    /// All packs in the `objects/packs` directory    pub packs: Vec<pack::Bundle>,    /// Locations of alternate databases    pub alternates: Vec<Db>,}