arrai action model manipul us nest action featur like differ associ type uml diagram nest action arrai sequenc diagram method follow action ul li action creat object li action add procedur link li action add creat link li action add asynchron link li action add synchron link li action add link ul inherit doc object uml action action action object action radio action action add classifi role action radio action action set add messag mode model meta type action button callact action radio action action set add messag mode model meta type action button returnact action radio action action set add messag mode model meta type creat action button createact action radio action action set add messag mode model meta type destroi action button destroyact hashtabl object hashtabl object sequenc expand button action radio action action set mode mode expand sequenc expand button clear sequenc contract button action radio action action set mode mode contract sequenc contract button action 