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  $elem = $driver->find_element('app-lgs','id' );
    Selenium::Screenshot->new(
...
      }]
    )->save( file => "screen.png" );

Selenium::Screenshot->new(
      png => $driver->screenshot,
...
        size     => { width => 10, height => 10 }
        location => { x => 5, y => 5 },
        }]