\unset ECHO
1|root object serialized via single dot, HTML-escaped|{"a": 1, "b": 2}
2|root object serialized via single dot, unescaped|{"a": 1, "b": 2}
3|root array serialized via single dot|[1, 2, 3]
4|array element object serialized during iteration|{"x": 1} {"y": 2}