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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def diff(name_a, name_b=None, **kwargs):
    '''
    Display the difference between a snapshot of a given filesystem and
    another snapshot of that filesystem from a later time or the current
    contents of the filesystem.

    name_a : string
        name of snapshot
    name_b : string
        (optional) name of snapshot or filesystem
    show_changetime : boolean
        display the path's inode change time as the first column of output. (default = True)
    show_indication : boolean
        display an indication of the type of file. (default = True)
    parsable : boolean
        if true we don't parse the timestamp to a more readable date (default = True)

    .. versionadded:: 2016.3.0

    CLI Example:

    .. code-block:: bash

        salt '*' zfs.diff myzpool/mydataset@yesterday myzpool/mydataset

    '''
    ## Configure command
    # NOTE: initialize the defaults
    flags = ['-H']
    target = []

    # NOTE: set extra config from kwargs
    if kwargs.get('show_changetime', True):
        flags.append('-t')
    if kwargs.get('show_indication', True):
        flags.append('-F')

    # NOTE: update target
    target.append(name_a)
    if name_b:
        target.append(name_b)

    ## Diff filesystem/snapshot
    res = __salt__['cmd.run_all'](
        __utils__['zfs.zfs_command'](
            command='diff',
            flags=flags,
            target=target,
        ),
        python_shell=False,
    )

    if res['retcode'] != 0:
        return __utils__['zfs.parse_command_result'](res)
    else:
        if not kwargs.get('parsable', True) and kwargs.get('show_changetime', True):
            ret = OrderedDict()
            for entry in res['stdout'].splitlines():
                entry = entry.split()
                entry_timestamp = __utils__['dateutils.strftime'](entry[0], '%Y-%m-%d.%H:%M:%S.%f')
                entry_data = "\t\t".join(entry[1:])
                ret[entry_timestamp] = entry_data
        else:
            ret = res['stdout'].splitlines()
        return ret