code: public String getButtonBar(Map<String, String> buttonNamesLookUp, String itemSeparator) {
  
          return getButtonBar(buttonNamesLookUp, itemSeparator, true);
      }
docs: Returns the specific editor button bar string generated from the configuration.<p>
  
  The lookup map can contain translations for the button names, the separator and the block names.
  The button bar will be automatically surrounded by block start and end items if they are not explicitly defined.<p>
  
  It may be necessary to write your own method to generate the button bar string for a specific editor widget.
  In this case, use the method {@link #getButtonBarShownItems()} to get the calculated list of shown button bar items.<p>
  
  @param buttonNamesLookUp the lookup map with translations for the button names, the separator and the block names or <code>null</code>
  @param itemSeparator the separator for the tool bar items
  @return the button bar string generated from the configuration