@protobuf(proto3)
@jsonschema(id="https://example.org/mystruct1.json")
----------------------------------------------------
[
["attribute", "@protobuf"],
["punctuation", "("],
"proto3",
["punctuation", ")"],
["attribute", "@jsonschema"],
["punctuation", "("],
"id",
["operator", "="],
["string-literal", [
["string", "\"https://example.org/mystruct1.json\""]
]],
["punctuation", ")"]
]