$VAR1 = {
          '_SHARED_DATA' => {
                              '_var' => 1
                            },
          'nestedFoo' => {
                           '_SHARED_DATA' => {
                                               '_var' => 1
                                             }
                         }
        };

Starting task Bar for Bar
Starting task Foo for Foo
Finished task Foo for Foo
Finished task Bar for Bar

$VAR1 = {
          '_SHARED_DATA' => {
                              '_var' => 2
                            },
          'nestedFoo' => {
                           '_SHARED_DATA' => {
                                               '_var' => 2
                                             }
                         }
        };