[forge-users] How Forge knows which facet to be used ?

Hi, I'm wondering how Forge knows which facet it should use if by example we have these classes defined under this package : org.jboss.forge.addon.javaee.jpa JPAFacetImpl_2_0 JPAFacetImpl_2_1 What do you suggest to do if I would to add a new JPAFacetImpl ? Regards, Charles