Latest version of org.immutables:gson
https://javadoc.io/doc/org.immutables/gson
Current version 2.1.18
https://javadoc.io/doc/org.immutables/gson/2.1.18
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.immutables/gson/2.1.18/package-list