onChange method
onChange is a function which is used to perform some action when the text is changed
Implementation
@override
void onChange(
TextEditingController textEditingController, String previousText) {
if((visibleIn == MentionsVisibility.usersConversationOnly && group != null)|| (visibleIn == MentionsVisibility.groupConversationOnly && group == null)){
return;
} else {
_onChange(textEditingController, previousText);
}
}