Latest version of org.immutables:gson
https://javadoc.io/doc/org.immutables/gson
Current version 2.8.9-ea-1
https://javadoc.io/doc/org.immutables/gson/2.8.9-ea-1
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.immutables/gson/2.8.9-ea-1/package-list