$ javac --enable-preview --release 27 src/LazyCollections.java && java --enable-preview LazyCollections     (27+35)
list created, size 3 (nothing computed yet)
  computing list element 1
list.get(1) = v1
list.get(1) again = v1
map created, size 3 (nothing computed yet)
  computing map value for bb
map.get("bb") = 2
map.get("bb") again = 2
set created
  testing 2
set.contains(2) = true
  testing 1
set.contains(1) = false
set.contains(9) = false
  testing 3
set.size() = 2

$ javac --enable-preview --release 26 src/LazyCollections.java     (26.0.2.1+1)
src/LazyCollections.java:18: error: cannot find symbol
        Set<Integer> set = Set.ofLazy(Set.of(1, 2, 3), n -> { System.out.println("  testing " + n); return n > 1; });
                              ^
  symbol:   method ofLazy(Set<Integer>,(n)->{ Sys[...] 1; })
  location: interface Set
1 error
exit=1