src/Traits/SortableTrait.php
public function isSortable()
    {
        if (property_exists($this, 'sortable')) {
            return is_string($this->sortable) || is_callable($this->sortable);
        }

        return false;
    }
public function isSortable()
    {
        if (property_exists($this, 'sortable')) {
            return is_string($this->sortable) || is_callable($this->sortable);
        }

        return false;
    }
public function isSortable ( ) { if ( property_exists ( $ this , 'sortable' ) ) { return is_string ( $ this -> sortable ) || is_callable ( $ this -> sortable ) ; } return false ; }
Is Sortable item.

@return bool
Is Sortable item .