docs: def get_arctic_version(self, symbol, as_of=None):
          """
          Return the numerical representation of the arctic version used to write the last (or as_of) version for
          the given symbol.
  
          Parameters
          ----------
          symbol : `str`
              symbol name for the item
          as_of : `str` or int or `datetime.datetime`
              Return the data as it was as_of the point in time.
              `int` : specific version number
              `str` : snapshot name which contains the version
              `datetime.datetime` : the version of the data that existed as_of the requested point in time
  
          Returns
          -------
          arctic_version : int
              The numerical representation of Arctic version, used to create the specified symbol version
          """
          return self._read_metadata(symbol, as_of=as_of).get('arctic_version', 0)