Is there an existing issue for this?

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Use case

Widgets that open a TextInputConnection might receive a TextInputConfiguration to forward it to TextInput.attach.

For those kinds of widgets, it's expected that they will detach and re-attach to the IME when the TextInputConfiguration changes during didUpdateWidget. For example:

@override
void didUpdateWidget(Widget oldWidget) {
  super.didUpdateWidget(oldWidget);
  if (widget.imeConfiguration != oldWidget.imeConfiguration) {
    // close input connection.
    // open new input connection.
  }
}

Consider this widget being used in the following example:

MyWidget(
  imeConfiguration: TextInputConfiguration(
    textCapitalization: TextCapitalization.characters,
  ),
)

In this example, each time the widget rebuilds, it closes and re-opens the IME connection, because we will have different TextInputConfiguration instances and, by checkingwidget.imeConfiguration != oldWidget.imeConfiguration, we are comparing only the references.

Proposal

Implement the == operator for both TextInputConfiguration and AutofillConfiguration, so two instances with the same values are considered to be equal.