maven-jaxb21-plugin with fluent-api

pom.xml

<plugin>
    <groupId>org.jvnet.jaxb2.maven2</groupId>
    <artifactId>maven-jaxb21-plugin</artifactId>
    <version>0.8.3</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <schemaDirectory>src/main/schema</schemaDirectory>
                <schemaIncludes>
                    <include>*.xsd</include>
                </schemaIncludes>
                <verbose>true</verbose>
                <extension>true</extension>
                <specVersion>2.1</specVersion>
            </configuration>
        </execution>
    </executions>
    <configuration>
        <extension>true</extension>
        <verbose>true</verbose>
        <args>
            <arg>-Xfluent-api</arg>
        </args>
        <plugins>
            <plugin>
                <groupId>org.jvnet.jaxb2_commons</groupId>
                <artifactId>jaxb2-fluent-api</artifactId>
                <version>3.0</version>
            </plugin>
        </plugins>
    </configuration>
</plugin>