Messages can't start with anything other than simple or qualified names.
a message by M{f1: e1, f2: e2, ..., fN: eN}, where M must be a simple or qualified name which resolves to a message
type (see Name Resolution)
Name Resolution
...
Resolution works as follows. If a.b is a name to be resolved in the context of
a protobuf declaration with scope A.B, then resolution is attempted, in order,
as A.B.a.b, A.a.b, and finally a.b. To override this behavior, one can use
.a.b; this name will only be attempted to be resolved in the root scope, i.e.
as a.b.
Also messages are a valid Primary for Member expressions.
A field selection expression, e.f, can be applied both to messages and to maps
TristonianJones
commented
1 year ago
Messages can't start with anything other than simple or qualified names.
Also messages are a valid
PrimaryforMemberexpressions.