code: public void setChanged(boolean changed) {
  
          m_changedStyleVar.setValue(
              changed
              ? I_CmsToolbarButtonLayoutBundle.INSTANCE.toolbarButtonCss().elementInfoChanged()
              : I_CmsToolbarButtonLayoutBundle.INSTANCE.toolbarButtonCss().elementInfoUnchanged());
      }
docs: Changes the "changed" state of the button.<p>
  
  @param changed the new value for the "changed" state