Generate classes with gradle and jaxb for tests with different configuration - testing

Question

I'm using
id "com.bmuschko.docker-java-application" version "3.0.7"
https://github.com/rackerlabs/gradle-jaxb-plugin
gradle plugin and this configuration:
jaxb {
xsdDir = "${project.projectDir}/src/main/xsd/"
bindingsDir = "${project.projectDir}/src/main/xsd/"
xjc {
taskClassname = "org.jvnet.jaxb2_commons.xjc.XJC2Task"
args = [
'-Xfluent-api'
]
}
}
sourceSets.main.java.srcDirs += "${generatedSources}"
compileJava.dependsOn xjc
for tests I want to add more arguments to xjc. And run this new task with regular gradle build (depending the test task on this one). Maven solves this with help of executions
<plugin>
<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb2-plugin</artifactId>
<version>0.13.1</version>
<executions>
<execution>
<id>prod</id>
<goals>
<goal>generate</goal>
</goals>
</execution>
<execution>
<id>test</id>
<phase>process-test-sources</phase>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<generateDirectory>target/generated-test-sources/xjc</generateDirectory>
<addCompileSourceRoot>false</addCompileSourceRoot>
<addTestCompileSourceRoot>true</addTestCompileSourceRoot>
<args>
<arg>-Xfluent-api</arg>
<arg>-Xinheritance</arg>
<arg>-Xannotate</arg>
<arg>-Xvalue-constructor</arg>
<arg>-Xequals</arg>
<arg>-XhashCode</arg>
<arg>-XtoString</arg>
</args>
</configuration>
</execution>
</executions>
<configuration>
<schemaDirectory>src/main/xsd</schemaDirectory>
<bindingDirectory>src/main/xsd</bindingDirectory>
<removeOldOutput>true</removeOldOutput>
<extension>true</extension>
<verbose>true</verbose>
<readOnly>true</readOnly>
<args>
<arg>-Xfluent-api</arg>
</args>
</configuration>
</plugin>
But how to solve it in gradle? I want as result 2 sets of classes in different folders - one for production code and one for tests (with additional jaxb plugins enabled).
Simple
task tst(type: org.openrepose.gradle.plugins.jaxb.task.JaxbXjc) {
}
Requires separate configuration
> No value has been specified for property 'bindings'.
> No value has been specified for property 'episodeDirectory'.
> No value has been specified for property 'generatedFilesDirectory'.
> No value has been specified for property 'schemasDirectory'.
> No value has been specified for property 'xsds'.
different from dsl. How to reuse the dsl-based configuration?