my @dk = (  {data => [
                    {
                        text => 'data',
                        data => {
                            spriteCssClass => 'folder',
                            'fullPath' => '/data'
                        },
                        contents => [
                                  {
                                    text => 'raw',
                                    data => {
                                        spriteCssClass => 'folder',
                                        fullPath => '/data/raw'
                                    },
                                    contents => [
                                        {
                                            text => 'file1.csv',
                                            data => {
                                                spriteCssClass => 'csv',
                                                fullPath => '/data/raw/file1.csv',
                                                size => '12345'
                                            }
                                        },
                                        {
                                            text => 'file2.csv',
                                            data => {
                                                spriteCssClass => 'csv',
                                                fullPath => '/data/raw/file2.csv',
                                                size => '123'
                                            }
                                        }
                                        
                                    ]
                                  },
                                  {
                                    text => 'rdf',
                                    data => {
                                        spriteCssClass => 'folder',
                                        fullPath => '/data/rdf'
                                    },
                                    contents => [
                                        {
                                            text => 'file1.rdf',
                                            data => {
                                                spriteCssClass => 'rdf',
                                                fullPath => '/data/raw/file1.rdf',
                                                size => '123456'
                                            }
                                        },
                                        {
                                            text => 'file2.csv',
                                            data => {
                                                spriteCssClass => 'rdf',
                                                fullPath => '/data/raw/file2.rdf',
                                                size => '1235'
                                            }
                                        }
                                    ]
                                  }
                                  ],
                     }
                    ]
            });