resetMentionsTracker method
      
void
resetMentionsTracker()
      
     
    
    
Implementation
void resetMentionsTracker() {
  mentionTracker = "";
  mentionStartIndex = 0;
  mentionEndIndex = 0;
  interceptedMention = null;
  conflictingIndex = null;
  if (onSearch != null) {
    onSearch!(null);
  }
  listItems.clear();
  if (suggestionListEventSink != null) {
    suggestionListEventSink?.add([]);
  }
}