<_param name="about" type="description">Layout Group is only about to help a better code generation (if you need it). To use this, you must to select some "Slicer rectangles" first.</_param>
<param name="html-id" type="string" _gui-text="HTML id attribute:"></param>
<param name="html-class" type="string" _gui-text="HTML class attribute:"></param>