+STR
+DOC
+MAP
=VAL "foo_value
=VAL "10
=VAL "bar
+MAP
=VAL "bar_value
=VAL "100
=VAL "foo
+MAP
=VAL "foo_value
=VAL "11
=VAL "bar
=VAL "null
-MAP
=VAL "baz
=VAL "null
-MAP
-MAP
-DOC
-STR