How to use the reprounzip-qt.reprounzip_qt.gui.unpack.UnpackerOptions function in reprounzip-qt

if self.distribution.text():
            options['args'].extend(['--distribution',
                                    self.distribution.text()])
            record_usage(docker_distribution=True)

        if self.install_pkgs.isChecked():
            options['args'].append('--install-pkgs')

        record_usage(root=options['root'],
                     docker_install_pkgs=self.install_pkgs.isChecked())

        return options


class VagrantOptions(UnpackerOptions):
    def __init__(self):
        super(VagrantOptions, self).__init__()

        self.image = QtGui.QLineEdit(placeholderText='detect')
        self.add_row("Base box:", self.image)

        self.distribution = QtGui.QLineEdit(placeholderText='detect')
        self.add_row("Distribution:", self.distribution)

        self.memory = QtGui.QSpinBox(suffix="MB", minimum=99, maximum=64000,
                                     specialValueText="(default)", value=99)
        self.add_row("Memory:", self.memory)

        self.gui = QtGui.QCheckBox("Enable local GUI")
        self.add_row("GUI:", self.gui)

class UnpackerOptions(QtGui.QWidget):
    def __init__(self):
        super(UnpackerOptions, self).__init__()
        self.setLayout(QtGui.QGridLayout())

    def add_row(self, label, widget):
        layout = self.layout()
        row = layout.rowCount()
        layout.addWidget(QtGui.QLabel(label), row, 0)
        layout.addWidget(widget, row, 1)

    def options(self):
        return {'args': []}


class DirectoryOptions(UnpackerOptions):
    def __init__(self):
        super(DirectoryOptions, self).__init__()
        self.layout().addWidget(
            QtGui.QLabel("(directory unpacker has no option)"),
            0, 0, 1, 2)


class ChrootOptions(UnpackerOptions):
    def __init__(self):
        super(ChrootOptions, self).__init__()

        self.root = QtGui.QComboBox(editable=False)
        self.root.addItems(ROOT.TEXT)
        self.add_row("Elevate privileges:", self.root)

        self.preserve_owner = QtGui.QCheckBox("enabled", tristate=True)

layout.addWidget(QtGui.QLabel(label), row, 0)
        layout.addWidget(widget, row, 1)

    def options(self):
        return {'args': []}


class DirectoryOptions(UnpackerOptions):
    def __init__(self):
        super(DirectoryOptions, self).__init__()
        self.layout().addWidget(
            QtGui.QLabel("(directory unpacker has no option)"),
            0, 0, 1, 2)


class ChrootOptions(UnpackerOptions):
    def __init__(self):
        super(ChrootOptions, self).__init__()

        self.root = QtGui.QComboBox(editable=False)
        self.root.addItems(ROOT.TEXT)
        self.add_row("Elevate privileges:", self.root)

        self.preserve_owner = QtGui.QCheckBox("enabled", tristate=True)
        self.preserve_owner.setCheckState(QtCore.Qt.PartiallyChecked)
        self.add_row("Preserve file ownership:", self.preserve_owner)

        self.magic_dirs = QtGui.QCheckBox(
            "mount /dev and /proc inside the chroot", tristate=True)
        self.magic_dirs.setCheckState(QtCore.Qt.PartiallyChecked)
        self.add_row("Mount magic dirs:", self.magic_dirs)

elif self.preserve_owner.checkState() == QtCore.Qt.Checked:
            options['args'].append('--preserve-owner')

        if self.magic_dirs.checkState() == QtCore.Qt.Unchecked:
            options['args'].append('--dont-bind-magic-dirs')
        elif self.magic_dirs.checkState() == QtCore.Qt.Checked:
            options['args'].append('--bind-magic-dirs')

        record_usage(
            chroot_preserve_owner=self.preserve_owner.checkState(),
            chroot_magic_dirs=self.magic_dirs.checkState())

        return options


class DockerOptions(UnpackerOptions):
    def __init__(self):
        super(DockerOptions, self).__init__()

        self.root = QtGui.QComboBox(editable=False)
        self.root.addItems(ROOT.TEXT)
        self.add_row("Elevate privileges:", self.root)

        try:
            cmd = ['docker-machine', 'ls', '-q']
            query = subprocess.Popen(cmd, stdout=subprocess.PIPE)
            out, _ = query.communicate()
            if query.returncode != 0:
                raise subprocess.CalledProcessError(query.returncode, cmd)
            self.machine = QtGui.QComboBox(editable=False)
            if 'DOCKER_HOST' in os.environ:
                self.machine.addItem("Custom config from environment", None)

def __init__(self):
        super(UnpackerOptions, self).__init__()
        self.setLayout(QtGui.QGridLayout())