How to use the pyno.draw.labelsGroup function in pyno

self.editor_size = size

        if connects:
            self.connected_to = connects

        self.code = None
        if not code:
            sub_pass = pkg_resources.resource_filename('pyno', 'examples/sub_pass.pn')
            code = sub_pass  # identical to '''examples/blank.pn'''

        self.name = ''
        self.label = pyglet.text.Label(self.name, font_name=font,
                                       bold=True, font_size=11,
                                       anchor_x='center', anchor_y='center',
                                       batch=batch, group=labelsGroup,
                                       color=(255, 255, 255, 230))
        self.pwindow = None
        self.input_nodes = {}
        self.output_nodes = {}
        self.new_code(code)

if connects:
            self.connected_to = connects

        self.window = window
        self.code = code

        self.document = pyglet.text.document.FormattedDocument(self.code)
        self.document.set_style(0, len(self.document.text),
                                dict(font_name=font,
                                     font_size=11,
                                     color=(0, 0, 0, 230)))
        self.layout = pyglet.text.layout.IncrementalTextLayout(
                self.document,
                self.w - 30, self.h - 3,
                multiline=True, batch=batch,
                group=labelsGroup)
        self.caret = pyglet.text.caret.Caret(self.layout)
        self.caret.color = (0, 0, 0)
        self.caret.visible = False

        self.incr = False
        self.resize = False

        self.inputs = ('input',)
        self.outputs = ('output',)
        self.insert_inouts({'inputs': self.inputs, 'outputs': self.outputs})

        self.pan_scale = [[0.0, 0.0], 1]
        self.screen_size = (800, 600)

        self.graphics['scroll'] = None
        self.graphics['corner'] = None

Processor.init_processor(self, window.global_scope)  # node has a processor for calculation

        self.window = window
        self.editor_size = size
        self.code = code

        if connects:
            self.connected_to = connects

        self.env = {}

        self.name = ''
        self.label = pyglet.text.Label(self.name, font_name=font,
                                       bold=True, font_size=11,
                                       anchor_x='center', anchor_y='center',
                                       batch=batch, group=labelsGroup,
                                       color=(255, 255, 255, 230))
        self.reload()