use std::convert::TryInto; use crate::{store, PartialNameRef, Reference}; mod error {    use std::convert::Infallible;     /// The error returned by [crate::file::Store::find_loose()].    #[derive(Debug, thiserror::Error)]    #[allow(missing_docs)]    pub enum Error {        #[error("An error occurred while finding a reference in the loose file database")]        Loose(#[from] crate::file::find::Error),        #[error("The ref name or path is not a valid ref name")]        RefnameValidation(#[from] crate::name::Error),    }     impl From<Infallible> for Error {        fn from(_: Infallible) -> Self {            unreachable!("this impl is needed to allow passing a known valid partial path as parameter")        }    }} pub use error::Error; use crate::store::handle; impl store::Handle {    /// TODO: actually implement this with handling of the packed buffer.    pub fn try_find<'a, Name, E>(&self, partial: Name) -> Result<Option<Reference>, Error>    where        Name: TryInto<&'a PartialNameRef, Error = E>,        Error: From<E>,    {        let _name = partial.try_into()?;        match &self.state {            handle::State::Loose { store: _, .. } => {                todo!()            }        }    }} mod existing {    mod error {        use std::path::PathBuf;         /// The error returned by [file::Store::find_existing()][crate::file::Store::find_existing()].        #[derive(Debug, thiserror::Error)]        #[allow(missing_docs)]        pub enum Error {            #[error("An error occurred while finding a reference in the database")]            Find(#[from] crate::store::find::Error),            #[error("The ref partially named {name:?} could not be found")]            NotFound { name: PathBuf },        }    }     use std::convert::TryInto;     pub use error::Error;     use crate::{store, PartialNameRef, Reference};     impl store::Handle {        /// Similar to [`crate::file::Store::find()`] but a non-existing ref is treated as error.        pub fn find<'a, Name, E>(&self, _partial: Name) -> Result<Reference, Error>        where            Name: TryInto<&'a PartialNameRef, Error = E>,            crate::name::Error: From<E>,        {            todo!()            // match self.try_find(partial) {}            // match self.find_one_with_verified_input(path.to_partial_path().as_ref(), packed) {            //     Ok(Some(r)) => Ok(r),            //     Ok(None) => Err(Error::NotFound(path.to_partial_path().into_owned())),            //     Err(err) => Err(err.into()),            // }        }    }}