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bnext # terminates current iteration without any 'push', but a list 
      # will still be returned if other iterations resulted 
...
      # iterations are retained in results.

bbail # Bails out with no result set (returns () )

package Bmap;

...
}

1;

use strict;
use warnings;
...
say "'next' version: @nexted";
say "'last' version: @lasted";
say "'bail' version: @bailed";

'next' version: this that the other
'last' version: this that
'bail' version: