Checks that if a variable exists for the time series id it has the appropriate attributes

        :param netCDF4.Dataset dataset: An open netCDF dataset

def check_timeseries_id(self, dataset):
        '''
        Checks that if a variable exists for the time series id it has the appropriate attributes

        :param netCDF4.Dataset dataset: An open netCDF dataset
        '''
        timeseries_ids = dataset.get_variables_by_attributes(cf_role='timeseries_id')
        # No need to check
        if not timeseries_ids:
            return
        test_ctx = TestCtx(BaseCheck.MEDIUM, 'Recommended attributes for the timeSeries variable')
        timeseries_variable = timeseries_ids[0]
        test_ctx.assert_true(
            getattr(timeseries_variable, 'long_name', '') != "",
            "long_name attribute should exist and not be empty"
        )
        return test_ctx.to_result()