print Dumper $hash0;

$VAR1 = 
bless( {
    'branch' => bless( {
         'lib/sample/sp.pm' => bless( {
             'branch' => bless( {
                 'lib/sample/sp.pm'=>     bless( {
                     'sample::sp' => '1'
                 }, 'DBM::Deep::Hash' )
             }, 'DBM::Deep::Hash' ),
         'branch' => $VAR1->{'branch'}{'lib/sample/sp.pm'}{'branch'}
         }, 'DBM::Deep::Hash' )
                     }, 'DBM::Deep::Hash' ),
'main' => bless( {}, 'DBM::Deep::Hash' ),
'main' => $VAR1->{'main'}
}, 'DBM::Deep::Hash' );