anchor.diff:  
   const int numOfMatchesToShow = 10;
   
  +final _fileNamesCache = <String, String>{};
  +
   class FileSearchField extends StatefulWidget {
     const FileSearchField({
       @required this.debuggerController,
  
positive.code:         _handleAutoCompleteOverlay);
  
      _query = autoCompleteController.search;
      _matches = widget.debuggerController.sortedScripts.value;
  
      // Open the autocomplete results immediately before a query is entered:
      SchedulerBinding.instance.addPostFrameCallback((_) => _handleSearch());
  
negative.code:   AutoCompleteController autoCompleteController;
  
    final _scriptsCache = <String, ScriptRef>{};
  
    final fileSearchFieldKey = GlobalKey(debugLabel: 'fileSearchFieldKey');
  
    String _query;
    FileSearchResults _searchResults;
  
    @override
    void initState() {
  