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

if not self.magic_dirs.isChecked():
            options['args'].append('--dont-bind-magic-dirs')
            record_usage(vagrant_magic_dirs=False)

        return options


class UnpackTab(QtGui.QWidget):
    """The unpack window, that sets up a .RPZ file in a directory.
    """
    UNPACKERS = [
        ('directory', DirectoryOptions),
        ('chroot', ChrootOptions),
        ('docker', DockerOptions),
        ('vagrant', VagrantOptions),
    ]

    unpacked = QtCore.pyqtSignal(str, object)

    def __init__(self, package='', **kwargs):
        super(UnpackTab, self).__init__(**kwargs)

        layout = QtGui.QGridLayout()
        layout.addWidget(QtGui.QLabel("RPZ package:"), 0, 0)
        self.package_widget = QtGui.QLineEdit(package, enabled=False)
        layout.addWidget(self.package_widget, 0, 1)
        browse_pkg = QtGui.QPushButton("Browse")
        browse_pkg.clicked.connect(self._browse_pkg)
        layout.addWidget(browse_pkg, 0, 2)

        layout.addWidget(QtGui.QLabel("Unpacker:"), 1, 0,

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)

        self.ports = QtGui.QLineEdit(
            '',