Ublaboo\DataGrid\DataGrid::findDefaultFilter PHP Method

    public function findDefaultFilter()
    {
        if (!empty($this->filter)) {
            return;
        }
        if ($this->getSessionData('_grid_has_filtered')) {
            return;
        }
        if (!empty($this->default_filter)) {
            $this->filter = $this->default_filter;
        }
        foreach ($this->filter as $key => $value) {
            $this->saveSessionData($key, $value);
        }
    }