Java EnumSet.allOf() is a static method in the Java EnumSet class that returns an EnumSet containing all the constants of a specified enum type. It creates a set that includes every value in the enum, useful for working with sets that contain all enum values. Introduced in Java 2004 with Java 5, allOf() is often used when you need to create a set of all possible values of an enum.

https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html