use bstr::{BStr, ByteSlice}; use crate::{extension, Entry, PathStorage, State, Version}; impl State {    pub fn version(&self) -> Version {        self.version    }     pub fn entries(&self) -> &[Entry] {        &self.entries    }    pub fn path_backing(&self) -> &PathStorage {        &self.path_backing    }    pub fn take_path_backing(&mut self) -> PathStorage {        assert_eq!(            self.entries.is_empty(),            self.path_backing.is_empty(),            "BUG: cannot take out backing multiple times"        );        std::mem::take(&mut self.path_backing)    }     pub fn return_path_backing(&mut self, backing: PathStorage) {        assert!(            self.path_backing.is_empty(),            "BUG: return path backing only after taking it, once"        );        self.path_backing = backing;    }     pub fn entries_with_paths_by_filter_map<'a, T>(        &'a self,        mut filter_map: impl FnMut(&'a BStr, &Entry) -> Option<T> + 'a,    ) -> impl Iterator<Item = (&'a BStr, T)> + 'a {        self.entries.iter().filter_map(move |e| {            let p = e.path(self);            filter_map(p, e).map(|t| (p, t))        })    }    pub fn entries_mut(&mut self) -> &mut [Entry] {        &mut self.entries    }    pub fn entries_mut_with_paths(&mut self) -> impl Iterator<Item = (&mut Entry, &BStr)> {        let paths = &self.path_backing;        self.entries.iter_mut().map(move |e| {            let path = (&paths[e.path.clone()]).as_bstr();            (e, path)        })    }    pub fn entries_mut_with_paths_in<'state, 'backing>(        &'state mut self,        backing: &'backing PathStorage,    ) -> impl Iterator<Item = (&'state mut Entry, &'backing BStr)> {        self.entries.iter_mut().map(move |e| {            let path = (&backing[e.path.clone()]).as_bstr();            (e, path)        })    }    pub fn tree(&self) -> Option<&extension::Tree> {        self.tree.as_ref()    }    pub fn link(&self) -> Option<&extension::Link> {        self.link.as_ref()    }    pub fn resolve_undo(&self) -> Option<&extension::resolve_undo::Paths> {        self.resolve_undo.as_ref()    }    pub fn untracked(&self) -> Option<&extension::UntrackedCache> {        self.untracked.as_ref()    }    pub fn fs_monitor(&self) -> Option<&extension::FsMonitor> {        self.fs_monitor.as_ref()    }}