How to use the sparkmagic.controllerwidget.abstractmenuwidget.AbstractMenuWidget function in sparkmagic

# Copyright (c) 2015  aggftw@gmail.com
# Distributed under the terms of the Modified BSD License.
from sparkmagic.controllerwidget.abstractmenuwidget import AbstractMenuWidget


class ManageSessionWidget(AbstractMenuWidget):
    def __init__(self, spark_controller, ipywidget_factory, ipython_display, refresh_method):
        # This is nested
        super(ManageSessionWidget, self).__init__(spark_controller, ipywidget_factory, ipython_display, True)

        self.refresh_method = refresh_method

        self.children = self.get_existing_session_widgets()

        for child in self.children:
            child.parent_widget = self

    def run(self):
        self.refresh_method()

    def get_existing_session_widgets(self):
        session_widgets = []

# Copyright (c) 2015  aggftw@gmail.com
# Distributed under the terms of the Modified BSD License.
import json

import sparkmagic.utils.configuration as conf
from sparkmagic.utils.constants import LANG_SCALA, LANG_PYTHON, LANG_PYTHON3
from sparkmagic.controllerwidget.abstractmenuwidget import AbstractMenuWidget


class CreateSessionWidget(AbstractMenuWidget):
    def __init__(self, spark_controller, ipywidget_factory, ipython_display, endpoints_dropdown_widget, refresh_method):
        # This is nested
        super(CreateSessionWidget, self).__init__(spark_controller, ipywidget_factory, ipython_display, True)

        self.refresh_method = refresh_method

        self.endpoints_dropdown_widget = endpoints_dropdown_widget

        self.session_widget = self.ipywidget_factory.get_text(
            description='Name:',
            value='session-name'
        )
        self.lang_widget = self.ipywidget_factory.get_toggle_buttons(
            description='Language:',
            options=[LANG_SCALA, LANG_PYTHON, LANG_PYTHON3],
        )

# Copyright (c) 2015  aggftw@gmail.com
# Distributed under the terms of the Modified BSD License.
from sparkmagic.controllerwidget.abstractmenuwidget import AbstractMenuWidget
from sparkmagic.livyclientlib.exceptions import HttpClientException
from sparkmagic.utils.sparklogger import SparkLog


class ManageEndpointWidget(AbstractMenuWidget):
    def __init__(self, spark_controller, ipywidget_factory, ipython_display, endpoints, refresh_method):
        # This is nested
        super(ManageEndpointWidget, self).__init__(spark_controller, ipywidget_factory, ipython_display, True)

        self.logger = SparkLog("ManageEndpointWidget")
        self.endpoints = endpoints
        self.refresh_method = refresh_method

        self.children = self.get_existing_endpoint_widgets()

        for child in self.children:
            child.parent_widget = self

    def run(self):
        self.refresh_method()

# Copyright (c) 2015  aggftw@gmail.com
# Distributed under the terms of the Modified BSD License.
from sparkmagic.controllerwidget.abstractmenuwidget import AbstractMenuWidget
from sparkmagic.livyclientlib.endpoint import Endpoint
import sparkmagic.utils.constants as constants


class AddEndpointWidget(AbstractMenuWidget):

    def __init__(self, spark_controller, ipywidget_factory, ipython_display, endpoints, endpoints_dropdown_widget,
                 refresh_method):
        # This is nested
        super(AddEndpointWidget, self).__init__(spark_controller, ipywidget_factory, ipython_display, True)

        widget_width = "800px"

        self.endpoints = endpoints
        self.endpoints_dropdown_widget = endpoints_dropdown_widget
        self.refresh_method = refresh_method

        self.address_widget = self.ipywidget_factory.get_text(
            description='Address:',
            value='http://example.com/livy',
            width=widget_width

# Copyright (c) 2015  aggftw@gmail.com
# Distributed under the terms of the Modified BSD License.
from sparkmagic.controllerwidget.abstractmenuwidget import AbstractMenuWidget
from sparkmagic.controllerwidget.addendpointwidget import AddEndpointWidget
from sparkmagic.controllerwidget.manageendpointwidget import ManageEndpointWidget
from sparkmagic.controllerwidget.managesessionwidget import ManageSessionWidget
from sparkmagic.controllerwidget.createsessionwidget import CreateSessionWidget
from sparkmagic.livyclientlib.endpoint import Endpoint
from sparkmagic.utils.constants import LANGS_SUPPORTED
import sparkmagic.utils.configuration as conf


class MagicsControllerWidget(AbstractMenuWidget):
    def __init__(self, spark_controller, ipywidget_factory, ipython_display, endpoints=None):
        super(MagicsControllerWidget, self).__init__(spark_controller, ipywidget_factory, ipython_display)

        if endpoints is None:
            endpoints = {endpoint.url: endpoint for endpoint in self._get_default_endpoints()}
        self.endpoints = endpoints

        self._refresh()

    def run(self):
        pass

    @staticmethod
    def _get_default_endpoints():
        default_endpoints = set()

# Copyright (c) 2015  aggftw@gmail.com
# Distributed under the terms of the Modified BSD License.
import json

import sparkmagic.utils.configuration as conf
from sparkmagic.utils.constants import LANG_SCALA, LANG_PYTHON
from sparkmagic.controllerwidget.abstractmenuwidget import AbstractMenuWidget


class CreateSessionWidget(AbstractMenuWidget):
    def __init__(self, spark_controller, ipywidget_factory, ipython_display, endpoints_dropdown_widget, refresh_method):
        # This is nested
        super(CreateSessionWidget, self).__init__(spark_controller, ipywidget_factory, ipython_display, True)

        self.refresh_method = refresh_method

        self.endpoints_dropdown_widget = endpoints_dropdown_widget

        self.session_widget = self.ipywidget_factory.get_text(
            description='Name:',
            value='session-name'
        )
        self.lang_widget = self.ipywidget_factory.get_toggle_buttons(
            description='Language:',
            options=[LANG_SCALA, LANG_PYTHON],
        )