public function getFilterValue($filterName)
    {
        if (isset($this->input['filters'][$filterName])) {
            return $this->input['filters'][$filterName];
        } else {
            return null;
        }
    }
public function getFilterValue($filterName)
    {
        if (isset($this->input['filters'][$filterName])) {
            return $this->input['filters'][$filterName];
        } else {
            return null;
        }
    }
public function getFilterValue ( $ filterName ) { if ( isset ( $ this -> input [ 'filters' ] [ $ filterName ] ) ) { return $ this -> input [ 'filters' ] [ $ filterName ] ; } else { return null ; } }
Returns input value for filter.

@param string $filterName
@return mixed
Returns input value for filter .