bankSearch function 
 
    
    
    
  Implementation
  List<dynamic>? bankSearch(
  List<dynamic>? bankList,
  String? searchText,
) {
  //  search bankList json by bankName using  searchText aphabert later
  if (bankList == null || searchText == null || searchText.isEmpty) {
    return bankList;
  }
  final filteredList = bankList.where((bank) {
    final name = bank['bankName'].toString().toLowerCase();
    final search = searchText.toLowerCase();
    return name.contains(search);
  }).toList();
  return filteredList.isEmpty ? null : filteredList;
}