provide a supported interface for toggling stacking
provide a supported interface for toggling stacking

shutterstock/rickshaw,butterflyhug/rickshaw,shutterstock/rickshaw,pombredanne/rickshaw,mcanthony/rickshaw,butterflyhug/rickshaw,dwt/rickshaw,adeelshahid/rickshaw,toniher/rickshaw,RobertoMalatesta/rickshaw,shutterstock/rickshaw,openhose/rickshaw,dwt/rickshaw,egorovpavel/rickshaw,dpobel/rickshaw,toniher/rickshaw,dwt/rickshaw,adeelshahid/rickshaw,mcanthony/rickshaw,JaySunSyn/rickshaw,egorovpavel/rickshaw,RobertoMalatesta/rickshaw,egorovpavel/rickshaw,toniher/rickshaw,zhangweiabc/rickshaw,butterflyhug/rickshaw,dpobel/rickshaw,boomtrain/rickshaw,JaySunSyn/rickshaw,RobertoMalatesta/rickshaw,zhangweiabc/rickshaw,IoTboy/rickshaw,dpobel/rickshaw,openhose/rickshaw,boomtrain/rickshaw,openhose/rickshaw,IoTboy/rickshaw,zhangweiabc/rickshaw,adeelshahid/rickshaw,JaySunSyn/rickshaw,mcanthony/rickshaw,IoTboy/rickshaw,boomtrain/rickshaw,pombredanne/rickshaw,pombredanne/rickshaw