human
Here's a good function header given the following:
I wrote the below code

    from Orange.widgets import widget, settings
    class DummyOWWidget(widget.OWWidget, ):
        '\n                                Dummy    OWWidget    used    to    report    import/init    errors    in    the    canvas.\n                                '
        name = 'Placeholder'
        class DummySettingsHandler(settings.SettingsHandler, ):
            def pack_data(self, widget):
                return getattr(widget, '_settings', {})
            def initialize(self, widget, data=None):
                widget._settings = data
                settings.SettingsHandler.initialize(self, widget, None)
            def write_defaults(self):
                pass
            def read_defaults(self):
                pass
        settingsHandler = DummySettingsHandler()
        want_main_area = False
        def __init__(self, parent=None):
            super().__init__(parent)
            self.errorLabel = QLabel(textInteractionFlags=Qt.TextSelectableByMouse, wordWrap=True)
            self.errorLabel.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
            self.controlArea.layout().addWidget(self.errorLabel)
        def setErrorMessage(self, message):
            self.errorLabel.setText(message)
            self.error(message)
    widget = DummyOWWidget()
    widget._settings = node.properties
    for link in node.description.inputs:
        handler = link.handler
        if handler.startswith('self.'):
            (_, handler) = handler.split('.', 1)
        setattr(widget, handler, (lambda *args: None))
    widget.setErrorMessage(message)
    return widget

What's a good function header?
assistant
#Here's a good function header.

def mock_error_owwidget(node, message):