showAutocorrectionPromptRect method
Requests that this client display a prompt rectangle for the given text range, to indicate the range of text that will be changed by a pending autocorrection.
This method will only be called on iOS.
Implementation
@override
void showAutocorrectionPromptRect(int start, int end) {
// TODO: implement showAutocorrectionPromptRect
print('ShowAutocorrectionPromptRect start: $start, end: $end');
}