use git_hash::ObjectId;use git_traverse::commit::{ancestors, Ancestors}; use crate::easy; pub trait Sealed {} /// An extension trait to add functionality to [`ObjectId`]s.pub trait ObjectIdExt: Sealed {    /// Create an iterator over the ancestry of the commits reachable from this id, which must be a commit.    fn ancestors<Find>(self, find: Find) -> Ancestors<Find, fn(&git_hash::oid) -> bool, ancestors::State>    where        Find: for<'a> FnMut(&git_hash::oid, &'a mut Vec<u8>) -> Option<git_object::CommitRefIter<'a>>;     /// Infuse this object id with an [`easy::Handle`].    fn attach(self, handle: &easy::Handle) -> easy::Oid<'_>;} impl Sealed for ObjectId {} impl ObjectIdExt for ObjectId {    fn ancestors<Find>(self, find: Find) -> Ancestors<Find, fn(&git_hash::oid) -> bool, ancestors::State>    where        Find: for<'a> FnMut(&git_hash::oid, &'a mut Vec<u8>) -> Option<git_object::CommitRefIter<'a>>,    {        Ancestors::new(Some(self), ancestors::State::default(), find)    }     fn attach(self, handle: &easy::Handle) -> easy::Oid<'_> {        easy::Oid::from_id(self, handle)    }}