Programmatic menus offer a more flexible way in comparison to the declarative approach. The whole menu structure can be created in Java and bound as a model to the
p:menu tag. Programmatic menu creation is the best choice when we load a menu definition from a database or XML file and the menu structure is not known beforehand.
In this recipe, we will learn about the PrimeFaces menu model and create a programmatic menu.
Every programmatically created menu instance should implement the Java interface
org.primefaces.model.MenuModel. PrimeFaces provides a default implementation
org.primefaces.model.DefaultMenuModel that is sufficient to use in most cases. Your own customized implementations of