code: public void setSize(I_CmsButton.Size size) {
  
          if (m_size != null) {
              removeStyleName(m_size.getCssClassName());
          }
          if (size != null) {
              addStyleName(size.getCssClassName());
          }
          m_size = size;
      }
docs: Sets the size.<p>
  
  @param size the size to set