How to use the @ckeditor/ckeditor5-ui/src/template.bind function in @ckeditor/ckeditor5-ui

_createDocumentColorsGrid() {
		const bind = Template.bind( this.documentColors, this.documentColors );
		const documentColorsGrid = new ColorGridView( this.locale, {
			columns: this.columns
		} );

		documentColorsGrid.delegate( 'execute' ).to( this );

		documentColorsGrid.extendTemplate( {
			attributes: {
				class: bind.if( 'isEmpty', 'ck-hidden' )
			}
		} );

		documentColorsGrid.items.bindTo( this.documentColors ).using(
			colorObj => {
				const colorTile = new ColorTileView();