Groovydoc: Fail to generate javadoc

[cliviu]

Hi,
I have classes containing Java records. I cannot generate javadoc for them using gmavenplus and groovydoc. I get the following message:

Attempting to ignore error parsing Java source file: mypackage/MyRecord.java
Consider reporting the error to the Groovy project: https://issues.apache.org/jira/browse/GROOVY
... or directly to the JavaParser project: https://github.com/javaparser/javaparser/issues
Error: (line 3,col 1) Record Declarations are not supported. Pay attention that this feature is supported starting from 'JAVA_14' language level. If you need that feature the language level must be configured in the configuration before parsing the source files.

I have configured the languageLevel like this

              `<execution>
                    <id>attach-docs</id>
                    <phase>prepare-package</phase>
                    <goals>
                        <goal>groovydoc</goal>
                    </goals>
                    <configuration>
                        <languageLevel>JAVA_17</languageLevel>
                    </configuration>
                </execution>`

but then ...

Failed to execute goal org.codehaus.gmavenplus:gmavenplus-plugin:4.2.1:groovydoc (attach-docs) on project xxx: Execution attach-docs of goal org.codehaus.gmavenplus:gmavenplus-plugin:4.2.1:groovydoc failed: argument type mismatch ->

What am I doing wrong?