fn(dataValue: String, filters: Object, item: Model)

Handler to proccess filtering.
Over this handler it is possible to do custom filtering.
It is very complex but possible to do any varient of self filtering.

Example

columns: [{
...
},{
  index: 'knownledge',    
  title: 'Knownledge',
  filter: {
    header: true,
    emptyText: 'Search',
    headerNote: true,
    fn: function(dataValue, filters, item){
      var filter = filters['knownledge'][""],
        splitted = filter.split(' ');
        
      //return true; If success passed filtering
        
      //return false; If failed filtering
    }
  }
...

Default

undefined