Is it possible to create TabbedContent widget in on_mount?

[python-and-novella]

I make a trick of TabbedContent , then i can create TabbedContent widget in on_mount.
But it is not a compatible change of TabbedContent.

from textual.app import App
from textual.widgets import TabbedContent,TabPane,Static

# patch TabbedContent
class TabbedContent(TabbedContent):
    def __init__(self,*children, titles = None, initial = "", name = None, id = None, classes = None, disabled = False):
        self.titles = [self.render_str(title) for title in titles] if titles else []
        super().__init__(*self.titles, initial=initial, name=name, id=id, classes=classes, disabled=disabled)
        self._tab_content = list(children)

class MyApp(App):
    # use TabbedContent in compose
    def compose(self):
        with TabbedContent(titles=['Yes','No']):
            yield Static('[green]Yes')
            yield Static('[red]No')
    # use TabbedContent in on_mount
    """ def on_mount(self):
        self.widgets = [
            TabbedContent(
                TabPane(
                    'Yes',
                    Static('[green]Yes')
                ),
                TabPane(
                    'No',
                    Static('[red]No')
                )
            )
        ]
        self.mount_all(self.widgets) """

if __name__ == '__main__':
    app = MyApp()
    app.run()

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