jsf/subsystem/src/main/java/org/jboss/as/jsf/deployment/JSFModuleIdFactory.java
String computeSlot(String jsfVersion) {
        if (jsfVersion == null) return defaultSlot;
        if (JsfVersionMarker.JSF_2_0.equals(jsfVersion)) return defaultSlot;
        return jsfVersion;
    }
String computeSlot(String jsfVersion) {
        if (jsfVersion == null) return defaultSlot;
        if (JsfVersionMarker.JSF_2_0.equals(jsfVersion)) return defaultSlot;
        return jsfVersion;
    }
If needed, convert old JSFVersionMarker values to slot values.

@param jsfVersion The version value from JSFVersionMarker, or null for default slot.
@return The equivalent slot value.