Unable to compile generated Dart

I have a proto file shared between multiples project, the generated code compile perfectly in all other language (C, Java, Swift, Go) but not in Dart.

A example below :
```proto
syntax = "proto3";

message info {
int32 value = 1;
}

message main {
oneof msg {
info info = 1;
}
}
```
I use both latest version of protoc (3.13.0) and protoc_plugin (19.0.1)

This example work perfectly in any other platform, but I can't compile generated Dart. The compiler tell me that he can't find the type `info`