mynewt
macro_rules! coap_item { (@cbor $context:ident, $children0:block) => { ... }; (@json $context:ident, $children0:block) => { ... }; }
Append an array item under the current object item. Add children0 as the array items. { <array0>: [ ..., { <children0> } ] }
children0
{ <array0>: [ ..., { <children0> } ] }