docs: def get_currency_exchange_intraday(self, from_symbol, to_symbol, interval='15min', outputsize='compact'):
          """ Returns the intraday exchange rate for any pair of physical
          currency (e.g., EUR) or physical currency (e.g., USD).
  
          Keyword Arguments:
              from_symbol: The currency you would like to get the exchange rate
                  for.
                  For example: from_currency=EUR or from_currency=USD.
              to_symbol: The destination currency for the exchange rate.
                  For example: to_currency=USD or to_currency=JPY.
              interval:  time interval between two conscutive values,
                  supported values are '1min', '5min', '15min', '30min', '60min'
                  (default '15min')
              outputsize:  The size of the call, supported values are
                  'compact' and 'full; the first returns the last 100 points in the
                  data series, and 'full' returns the full-length intraday times
                  series, commonly above 1MB (default 'compact')
          """
          _FUNCTION_KEY = 'FX_INTRADAY'
          return _FUNCTION_KEY, "Time Series FX ({})".format(interval), 'Meta Data'