Latest version of org.ff4j:ff4j-core
https://javadoc.io/doc/org.ff4j/ff4j-core
Current version 1.8.7
https://javadoc.io/doc/org.ff4j/ff4j-core/1.8.7
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.ff4j/ff4j-core/1.8.7/package-list