The properties() method returns a set of entries, as instances of java.util.Map.Entry. You can thus write code such as:

function dump = |obj| {
  foreach prop in obj: properties() {
    println(prop: getKey() + " -> " + prop: getValue())
  }
}

Because dynamic object entries mix both values and method handles, do not forget that the predefined isClosure(obj) function can be useful to distinguish them.