public function add($name, $filter, array $options = [])
    {
        $this->_collection()->add($name, $filter, $options);

        return $this;
    }
public function add($name, $filter, array $options = [])
    {
        $this->_collection()->add($name, $filter, $options);

        return $this;
    }
public function add ( $ name , $ filter , array $ options = [ ] ) { $ this -> _collection ( ) -> add ( $ name , $ filter , $ options ) ; return $ this ; }
Adds a new filter to the active collection.

@param string $name Field name.
@param string $filter Filter name.
@param array $options Filter options.
@return $this
Adds a new filter to the active collection .