src/js/pagination/paging-collection.js
function(filterFieldName) {
                var val = this.getActiveFilterFields(true)[filterFieldName];
                return (_.isNull(val) || _.isUndefined(val)) ? null : val;
            }
function(filterFieldName) {
                var val = this.getActiveFilterFields(true)[filterFieldName];
                return (_.isNull(val) || _.isUndefined(val)) ? null : val;
            }
function ( filterFieldName ) { var val = this . getActiveFilterFields ( true ) [ filterFieldName ] ; return ( _ . isNull ( val ) || _ . isUndefined ( val ) ) ? null : val ; }
Gets the value of the given filter field.

@returns {String} the current value of the requested filter
field.  null means that the filter field is not active.
Gets the value of the given filter field .