proc main() { var a = [1,2,3].enclose(); var b = a.disclose(); b[1] = 20; print("'a: ', V", a); print("'b: ', 3(V,X)", b); var c = @@a; b[1] = 200; print("'b: ', 3(V,X)", b); print("'c: ', V", c); }