JAXB - XJC - influencing generated typesafe enum class and members

<xs:simpleType name="test">
    <xs:annotation>
        <xs:appinfo>
            <jaxb:typesafeEnumClass/>
        </xs:appinfo>
    </xs:annotation>
    <xs:restriction base="xs:string">
      <xs:enumeration value="4">
        <xs:annotation>
	      <xs:appinfo>
	        <jaxb:typesafeEnumMember name="FOUR"/>
	      </xs:appinfo>
	    </xs:annotation>
      </xs:enumeration>
	  <xs:enumeration value="6">
        <xs:annotation>
	      <xs:appinfo>
	        <jaxb:typesafeEnumMember name="SIX"/>
	      </xs:appinfo>
        </xs:annotation>
      </xs:enumeration>
	 </xs:restriction>
</xs:simpleType>

@XmlEnum
public enum Test {

    @XmlEnumValue("4")
    FOUR("4"),
    @XmlEnumValue("6")
    SIX("6");
    private final String value;

    Test(String v) {
        value = v;
    }

    public String value() {
        return value;
    }

    public static Test fromValue(String v) {
        for (Test c: Test.values()) {
            if (c.value.equals(v)) {
                return c;
            }
        }
        throw new IllegalArgumentException(v.toString());
    }

}