<multiplicity>*</multiplicity>
          </association>
          <description><![CDATA[Restricts the classes/resources from the current artifact's CoreExtension class realm that are exposed. Values ending with ".*" expose all classes/resources which are directly contained in the given package in binary form. 

        // but to create those, proper filtering should happen via Type properties.
    }

    @Override
    public void addHandlers(Map<String, ArtifactHandler> handlers) {
        throw new UnsupportedOperationException("Adding handlers programmatically is not supported anymore");
    }

    @Deprecated
    public Set<String> getHandlerTypes() {

     2. append happens at plugin level first, then goal level, independently from phases.
        This means for example that adding pluginA:goal2 to pre-existing (pluginA:goal1, pluginB:goal) will lead to (pluginA:goal1, pluginA:goal2, pluginB:goal)