use std::{    convert::TryInto,    path::{Path, PathBuf},}; use git_object::bstr::{BStr, BString, ByteSlice, ByteVec}; use crate::{FullName, FullNameRef, Namespace, PartialNameRef}; impl Namespace {    /// Dissolve ourselves into the interior representation    pub fn into_bstring(self) -> BString {        self.0    }    /// Return ourselves as    pub fn as_bstr(&self) -> &BStr {        self.0.as_ref()    }    /// Return ourselves as a path for use within the filesystem.    pub fn to_path(&self) -> &Path {        git_path::from_byte_slice(&self.0)    }    /// Append the given `prefix` to this namespace so it becomes usable for prefixed iteration.    pub fn into_namespaced_prefix(mut self, prefix: impl AsRef<Path>) -> PathBuf {        let path = prefix.as_ref();        let prefix = git_path::into_bstr(path);        self.0.push_str(prefix.as_ref());        git_path::to_native_path_on_windows(self.0).into_owned()    }    pub(crate) fn into_namespaced_name(mut self, name: &FullNameRef) -> FullName {        self.0.push_str(name.as_bstr());        FullName(self.0)    }} /// Given a `namespace` 'foo we output 'refs/namespaces/foo', and given 'foo/bar' we output 'refs/namespaces/foo/refs/namespaces/bar'.////// For more information, consult the [git namespace documentation](https://git-scm.com/docs/gitnamespaces).pub fn expand<'a, Name, E>(namespace: Name) -> Result<Namespace, git_validate::refname::Error>where    Name: TryInto<&'a PartialNameRef, Error = E>,    git_validate::refname::Error: From<E>,{    let namespace = &namespace.try_into()?.0;    let mut out = BString::default();    for component in namespace.split_str(b"/") {        out.push_str("refs/namespaces/");        out.push_str(component);        out.push_str(b"/");    }    Ok(Namespace(out))}