372         let file_id = self.files.len();  in add()  localVariable
374         file_id  in add()
378     pub fn get(&self, file_id: usize) -> Result<&SimpleFile<Name, Source>, Error> {  in get()
379         self.files.get(file_id).ok_or(Error::FileMissing)  in get()
392     fn name(&self, file_id: usize) -> Result<Name, Error> {  in name()
393         Ok(self.get(file_id)?.name().clone())  in name()
396     fn source(&self, file_id: usize) -> Result<&str, Error> {  in source()
397         Ok(self.get(file_id)?.source().as_ref())  in source()
400     fn line_index(&self, file_id: usize, byte_index: usize) -> Result<usize, Error> {  in line_index()
401         self.get(file_id)?.line_index((), byte_index)  in line_index()
404     fn line_range(&self, file_id: usize, line_index: usize) -> Result<Range<usize>, Error> {  in line_range()
405         self.get(file_id)?.line_range((), line_index)  in line_range()