def verify_app_initialization(self):
    'Check that the app was properly initialized.\n\n        Raises:\n            RuntimeError: if child class has not called `self.register_uniq_ids`\n\n        '
    super().verify_app_initialization()
    allowed_locations = ('left', 'top', 'bottom', 'right')
    if (self.tabs_location not in allowed_locations):
        raise RuntimeError(f'`self.tabs_location = {self.tabs_location}` is not in {allowed_locations}')
Check that the app was properly initialized.

Raises:
    RuntimeError: if child class has not called `self.register_uniq_ids`
def verify_app_initialization(self):
    'Check that the app was properly initialized.\n\n        Raises:\n            RuntimeError: if child class has not called `self.register_uniq_ids`\n\n        '
    super().verify_app_initialization()
    allowed_locations = ('left', 'top', 'bottom', 'right')
    if (self.tabs_location not in allowed_locations):
        raise RuntimeError(f'`self.tabs_location = {self.tabs_location}` is not in {allowed_locations}')