HelloWorldExample). Since this is the  first example of the guide, before looking at Java code we will go through the common artifacts  8  needed to build a Wicket application from scratch.    All the example place some mock HTML to show  how the final panel should look like.  5.3. Divide et impera!  Let’s go back to our layout example. In chapter 5.1 we have divided our layout in common areas  that must be 6.6. Adding header contents to the final page  Panel’s markup can also contain HTML tags which must go inside header section of the final page,  like tags