How to use the kivymd.list.ILeftBody function in kivymd

from kivy.app import App
from kivy.clock import Clock, mainthread
from kivy.properties import ListProperty
from kivymd.label import MDLabel
from kivymd.list import ILeftBody, ThreeLineAvatarListItem
from pyetheroll.constants import ROUND_DIGITS

from etherollapp.etheroll.ui_utils import Dialog, SubScreen, load_kv_from_py
from etherollapp.etheroll.utils import run_in_thread

load_kv_from_py(__file__)


class DiceResultWidget(ILeftBody, MDLabel):
    pass


class RollResultsScreen(SubScreen):

    roll_logs = ListProperty()

    def __init__(self, **kwargs):
        super(RollResultsScreen, self).__init__(**kwargs)
        # TODO: make it a property that starts/stops spinner on set
        self._fetching_results = False
        Clock.schedule_once(self._after_init)

    def _after_init(self, dt):
        """
        Binds events.

root.active_color_type == "custom" else root._active_color if root.use_active else \
            root.theme_cls.secondary_text_color
        text: root.badge_text
        halign: 'right'


:
    canvas:
        Color:
            rgba: self.theme_cls.divider_color
        Line:
            points: root.x ,root.y+dp(8), root.x+self.width, root.y+dp(8)
""")


class NDIconLabel(ILeftBody, MDLabel):
    pass


class NDBadgeLabel(IRightBody, MDLabel):
    pass


class NavigationDrawerHeaderBase:
    '''
    Tells the :class:`~MDNavigationDrawer` that this should be in the header area (above the
    :class:`~kivy.uix.scrollview.ScrollView`).
    '''

    pass

bs.open()

    def set_error_message(self, *args):
        if len(self.root.ids.text_field_error.text) == 2:
            self.root.ids.text_field_error.error = True
        else:
            self.root.ids.text_field_error.error = False

    def on_pause(self):
        return True

    def on_stop(self):
        pass


class AvatarSampleWidget(ILeftBody, Image):
    pass


class IconLeftSampleWidget(ILeftBodyTouch, MDIconButton):
    pass


class IconRightSampleWidget(IRightBodyTouch, MDCheckbox):
    pass


if __name__ == '__main__':
    KitchenSink().run()

else:
            self.gl_content.add_widget(widget, index)


Builder.load_string('''
#:import md_icons kivymd.icon_definitions.md_icons

    font_style: 'Icon'
    text: u"{}".format(md_icons[root.icon])
    halign: 'center'
    theme_text_color: 'Primary'
    valign: 'middle'
''')


class ListBSIconLeft(ILeftBody, MDLabel):
    icon = StringProperty()


class MDListBottomSheet(MDBottomSheet):
    mlist = ObjectProperty()

    def __init__(self, **kwargs):
        super(MDListBottomSheet, self).__init__(**kwargs)
        self.mlist = MDList()
        self.gl_content.add_widget(self.mlist)
        Clock.schedule_once(self.resize_content_layout, 0)

    def resize_content_layout(self, *largs):
        self.gl_content.height = self.mlist.height

    def add_item(self, text, callback, icon=None):

BoxLayout:
                    MDLabel:
                        font_style: 'Headline'
                        theme_text_color: 'Primary'
                        text: "Counter: 0"
                        halign: 'center'
                        pos_hint: {'center_x': 0.5, 'center_y': 0.75}
                MDFloatingActionButton:
                    icon: 'plus'
                    elevation_normal: 2
                    pos_hint: {'center_x': 0.5, 'center_y': 0.25}
                    on_press: app.ads.show_rewarded_ad()
""")


class AvatarIconWidget(ILeftBody, Image):
    pass


class KivMobDemoUI(FloatLayout):

    def switch_to_screen(self, name, title):
        self.ids.toolbar.title = title
        self.ids.toolbar.left_action_items = [['chevron-left', lambda x: self.back_to_menu()]]
        self.ids.scr_mngr.transition.direction = 'left'
        self.ids.scr_mngr.current = name
        self.snackbar = Snackbar(text="Interstitial has not yet loaded.")


    def back_to_menu(self):
        self.ids.scr_mngr.transition.direction = 'right'
        self.ids.scr_mngr.current = "menu"

root.active_color_type == "custom" else root._active_color if root.use_active else \
            root.theme_cls.secondary_text_color
        text: root.badge_text
        halign: 'right'


:
    canvas:
        Color:
            rgba: self.theme_cls.divider_color
        Line:
            points: root.x ,root.y+dp(8), root.x+self.width, root.y+dp(8)
""")


class NDIconLabel(ILeftBody, MDLabel):
    pass


class NDBadgeLabel(IRightBody, MDLabel):
    pass


class NavigationDrawerHeaderBase:
    '''
    Tells the :class:`~MDNavigationDrawer` that this should be in the header area (above the
    :class:`~kivy.uix.scrollview.ScrollView`).
    '''

    pass

Line(points=[x_left, y_up, x_left+0.8*self.r*sin(pi/30*time.second), y_up+0.8*self.r*cos(pi/30*time.second)], width=1, cap="round")
                Color(1.0, 1.0, 1.0, 1)
                Line(points=[x_left, y_up, x_left+0.7*self.r*sin(pi/30*time.minute), y_up+0.7*self.r*cos(pi/30*time.minute)], width=2, cap="round")
                Color(1.0, 1.0, 1.0, 1)
                th = time.hour*60 + time.minute
                Line(points=[x_left, y_up, x_left+0.5*self.r*sin(pi/360*th), y_up+0.5*self.r*cos(pi/360*th)], width=3, cap="round")

class MyClockWidget(FloatLayout):
    Ticks = Ticks()
    pass

#KIVYMD classes
class IconLeftSampleWidget(ILeftBodyTouch, MDIconButton):
    pass

class AvatarSampleWidget(ILeftBody, Image):
    pass


#_________________________________________________________________
        #MAINAPP


class MainApp(App):
    theme_cls = ThemeManager()
    version = StringProperty()
    timenow = StringProperty()
    datenow = StringProperty()
    daynow = StringProperty()
    yearnow = StringProperty()
    ampm = StringProperty()
    tempnow = StringProperty()

def add_widget(self, widget, index=0):
        if issubclass(widget.__class__, ILeftBody):
            self.ids['_left_container'].add_widget(widget)
        elif issubclass(widget.__class__, ILeftBodyTouch):
            self.ids['_left_container'].add_widget(widget)
            self._touchable_widgets.append(widget)
        elif issubclass(widget.__class__, IRightBody):
            self.ids['_right_container'].add_widget(widget)
        elif issubclass(widget.__class__, IRightBodyTouch):
            self.ids['_right_container'].add_widget(widget)
            self._touchable_widgets.append(widget)
        else:
            return super(BaseListItem, self).add_widget(widget)