function filter_orphaned_cells_of_type($cell)
 {
     if (is_object($cell) && property_exists($cell, 'cell_type') && $cell->cell_type === $this->cell_type && $cell->content && $cell->content->{$this->property}) {
         return WPDD_Utils::is_post_published($cell->content->{$this->property}) === false;
     }
 }