def METHOD_NAME(*args, **kwargs):
    """
    Return the DIFFERENCE of the result sets returned by each matching minion
    pool
    .. versionadded:: 2014.7.0
    These pools are determined from the aggregated and sorted results of
    a salt command.
    This command displays the "diffs" as a series of 2-way differences --
    namely the difference between the FIRST displayed minion pool
    (according to sort order) and EACH SUBSEQUENT minion pool result set.
    Differences are displayed according to the Python ``difflib.unified_diff()``
    as in the case of the salt execution module ``file.get_diff``.
    This command is submitted via a salt runner using the general form::
        salt-run survey.diff [survey_sort=up/down] <target>
                     <salt-execution-module> <salt-execution-module parameters>
    Optionally accept a ``survey_sort=`` parameter. Default:
    ``survey_sort=down``
    CLI Example #1: (Example to display the "differences of files")
    .. code-block:: bash
        salt-run survey.diff survey_sort=up "*" cp.get_file_str file:///etc/hosts
    """
    # TODO: The salt execution module "cp.get_file_str file:///..." is a
    # non-obvious way to display the differences between files using
    # survey.diff .  A more obvious method needs to be found or developed.
    import difflib
    bulk_ret = _get_pool_results(*args, **kwargs)
    is_first_time = True
    for k in bulk_ret:
        print("minion pool :\n------------")
        print(k["pool"])
        print("pool size :\n----------")
        print("    " + str(len(k["pool"])))
        if is_first_time:
            is_first_time = False
            print("pool result :\n------------")
            print("    " + bulk_ret[0]["result"])
            print()
            continue
        outs = 'differences from "{}" results :'.format(bulk_ret[0]["pool"][0])
        print(outs)
        print("-" * (len(outs) - 1))
        from_result = bulk_ret[0]["result"].splitlines()
        for idx, _ in enumerate(from_result):
            from_result[idx] += "\n"
        to_result = k["result"].splitlines()
        for idx, _ in enumerate(to_result):
            to_result[idx] += "\n"
        outs = ""
        outs += "".join(
            difflib.unified_diff(
                from_result,
                to_result,
                fromfile=bulk_ret[0]["pool"][0],
                tofile=k["pool"][0],
                n=0,
            )
        )
        print(outs)
        print()
    return bulk_ret