Nested messages

[lyzzard]

When two message definitions are nested one inside the other, the inner one is translated like a part of the outer's label, creating a syntax error.

message User {

    message Attributes {
        optional fixed32 created_at = 1;
        optional fixed32 updated_at = 2;
    }

    optional uint32 id = 1;
    optional string name = 2;
    optional Attributes attributes = 3;
}

Not sure how this should be visualized, though.