How to use the reprounzip-qt.reprounzip_qt.gui.run.ChrootOptions function in reprounzip-qt

def _reset(self):
        selected = self.files_widget.selectedIndexes()[0].row()
        file_status = self.files_status[selected]
        record_usage(file_reset=True)
        handle_error(self, reprounzip.upload(
            self.directory, file_status.name, None,
            unpacker=self.unpacker, root=self.root))
        self._file_changed()


class RunTab(QtWidgets.QWidget):
    """The main window, that allows you to run/change an unpacked experiment.
    """
    UNPACKERS = [
        ('directory', DirectoryOptions),
        ('chroot', ChrootOptions),
        ('docker', DockerOptions),
        ('vagrant', VagrantOptions),
    ]

    directory = None
    unpacker = None

    def __init__(self, unpacked_directory='', **kwargs):
        super(RunTab, self).__init__(**kwargs)

        layout = QtWidgets.QGridLayout()
        layout.addWidget(QtWidgets.QLabel("Experiment directory:"), 0, 0)
        self.directory_widget = QtWidgets.QLineEdit(unpacked_directory)
        self.directory_widget.editingFinished.connect(self._directory_changed)
        layout.addWidget(self.directory_widget, 0, 1)
        browse = QtWidgets.QPushButton("Browse")

def __init__(self):
        super(ChrootOptions, self).__init__()
        self.add_x11()