options.linksOffline(javadocs.getGroovyApi().get().toString(), extractGroovyPackageListTask.map(Copy::getDestinationDir).get().getAbsolutePath());

            task.source(extension.getDocumentedSource()
                .filter(f -> f.getName().endsWith(".java"))
                .filter(new DeduplicatePackageInfoFiles())
            );

            task.setClasspath(extension.getClasspath());