def get_sandbox_table_name(table_namer, base_name):
    """
    A helper function to create a table in the sandbox dataset

    :param table_namer: the string value returned from the table_namer setter method
    :param base_name: the name of the cleaning rule
    :return: the concatenated table name
    """
    if table_namer and not table_namer.isspace():
        return f'{table_namer}_{base_name}'
    else:
        return base_name