···

       
440
       
440
       
 
       
                .range(..end_key)

     

       
441
       
441
       
 
       
                .rev()

     

       
442
       
442
       
 
       
                .map_while(move |res| res.map_err(AppError::from).and_then(map_block).transpose())

     

       
443
       
443
       
+
       
                .collect_vec()

     

       
444
       
444
       
+
       
                .into_iter()

     

       
445
       
445
       
+
       
                .rev()

     

       
443
       
446
       
 
       
                .flatten()

     

       
444
       
447
       
 
       
                .flatten(),

     

       
445
       
448
       
 
       
        )