Hi Claes, > http://cr.openjdk.java.net/~redestad/8193128/open.05/
src/java.base/share/classes/java/util/ImmutableCollections.java 599 public boolean contains(Object o) { 600 Objects.requireNonNull(o); 601 return size > 0 && probe(o) >= 0; // implicit nullcheck of o 602 } I think that the comment about the implicit null check in the line 601 is not needed anymore. Best regards, Andrej Golovnin