libdata-walk-perl 1.00-3 (amd64 binary) in ubuntu xenial

 With Data::Walk, one can have a call back function being called for each node
 in a given structure. It works with hash references, array references and
 blessed references of arbitrary depth.
 .
 Data::Walk is similar to File::Find, but instead of directory hierachies, it
 works with Perl data.