Illuminate\Database\Query\Builder::max PHP Method

    public function max($column)
    {
        return $this->aggregate(__FUNCTION__, [$column]);
    }

 /**
  * Retrieve the maximum value of a given column.
  *
  * @param string $column
  * @return float|int 
  * @static 
  */
 public static function max($column)
 {
     return \Illuminate\Database\Query\Builder::max($column);
 }