nl_tokens: Does the subject deserve an slideshow pane?
pl_tokens: function ( subject ) { var kb = UI . store var ns = UI . ns var t = kb . findTypeURIs ( subject ) if ( t [ ns . ldp ( 'Container' ) . uri ] || t [ ns . ldp ( 'BasicContainer' ) . uri ] ) { var contents = kb . each ( subject , ns . ldp ( 'contains' ) ) var count = 0 contents . map ( function ( <mask> ) { if ( UI . widgets . isImage ( file ) ) count ++ } ) return count > 0 ? 'Slideshow' : null } return null }