	keyEvent: function( event ) {
		// The escape key closes the preview
		if ( event.keyCode === 27 ) {
			this.undelegateEvents();
			this.close();
		}
		// The right arrow key, next theme
		if ( event.keyCode === 39 ) {
			_.once( this.nextTheme() );
		}

		// The left arrow key, previous theme
		if ( event.keyCode === 37 ) {
			this.previousTheme();
		}
	},
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.