docs: def exists(self, table_name, timeout=None):
          '''
          Returns a boolean indicating whether the table exists.
  
          :param str table_name:
              The name of table to check for existence.
          :param int timeout:
              The server timeout, expressed in seconds.
          :return: A boolean indicating whether the table exists.
          :rtype: bool
          '''
          _validate_not_none('table_name', table_name)
          request = HTTPRequest()
          request.method = 'GET'
          request.host = self._get_host()
          request.path = '/Tables' + "('" + table_name + "')"
          request.headers = [('Accept', TablePayloadFormat.JSON_NO_METADATA)]
          request.query = [('timeout', _int_to_str(timeout))]
  
          try:
              self._perform_request(request)
              return True
          except AzureHttpError as ex:
              _dont_fail_not_exist(ex)
              return False