addTextEditListener method Null safety

dynamic addTextEditListener()

Implementation

addTextEditListener() {
  searchCon.addListener(() async {
    if (jusoVM.keyword == searchCon.text) return;
    jusoVM.keyword = searchCon.text;
    jusoVM.page = 1;
    jusoVM.fetchJuso(jusoVM.keyword, jusoVM.page);
  });
}