An interface to be implemented by application level listeners or other entities that wish to contribute to the header section of the page. Class {@link org.apache.wicket.Component} alreadyimplements it.
Example:
class MyPanel extends Panel { public MyPanel(String id) { super(id); } public void renderHead(IHeaderResponse response) { response.render(JavaScriptHeaderItem.forScript("alert('page loaded!');")); } }
@see IHeaderResponse
@see HeaderItem
@see Application#getHeaderContributorListeners()
@author Juergen Donnerstag
@author Matej Knopp