code: def native(self, writeAccess=False, isolation_level=None):
          
          host = self.database().writeHost() if writeAccess else self.database().host()
          conn = self.open(writeAccess=writeAccess)
          try:
              if isolation_level is not None:
                  if conn.isolation_level == isolation_level:
                      isolation_level = None
                  else:
                      conn.set_isolation_level(isolation_level)
              yield conn
          except Exception:
              if self._closed(conn):
                  conn = None
                  self.close()
              else:
                  conn = self._rollback(conn)
              raise
          else:
              if not self._closed(conn):
                  self._commit(conn)
          finally:
              if conn is not None and not self._closed(conn):
                  if isolation_level is not None:
                      conn.set_isolation_level(isolation_level)
                  self.__pool[host].put(conn)
docs: Opens a new database connection to the database defined
          by the inputted database.
  
          :return     <varaint> native connection