function () {
        var values = this.getValue(),
            key;
        for (key in values) {
            if (values[key] !== undefined) {
                return true;
            }
        }
        return false;
    }
function () {
        var values = this.getValue(),
            key;
        for (key in values) {
            if (values[key] !== undefined) {
                return true;
            }
        }
        return false;
    }
function ( ) { var values = this . getValue ( ) , key ; for ( key in values ) { if ( values [ key ] !== undefined ) { return true ; } } return false ; }
Template method that is to return <tt>true</tt> if the filter
has enough configuration information to be activated.
@return {Boolean}
Template method that is to return <tt > true< / tt > if the filter has enough configuration information to be activated .