/**
  * Set the PDO connection.
  *
  * @param \PDO|null $pdo
  * @return $this 
  * @throws \RuntimeException
  * @static 
  */
 public static function setPdo($pdo)
 {
     //Method inherited from \Illuminate\Database\Connection
     return \Illuminate\Database\PostgresConnection::setPdo($pdo);
 }