code: public static void pushContext(final UIContext uic) {
  		if (DebugUtil.isDebugFeaturesEnabled()) {
  			ALL_ACTIVE_CONTEXTS.put(getPrimaryUIContext(uic), null);
  		}
  
  		getStack().push(uic);
  	}
docs: Pushes a context onto the top of stack. This method is called by internal WComponent containers (e.g. WServlet)
  at the start of processing a request. and by components which repeat content.
  
  @param uic the UIContext to push.