code: public Iterator<V> get(CharSequence text, int start) {
          return get(text, start, null);
      }
docs: Gets an iterator of the objects associated with the
  longest prefix matching string key starting at the
  specified position.
  
  @param text The text to be matched with prefixes.
  @param start The start index of of the text
  @return An iterator of the objects associated with the
  longest prefix matching matching key, or null if no
  matching entry is found.