swift-protobuf/Protos/CompileTests/InternalImportsByDefault/SomeProtoWithBytes.proto

// This proto will generate a Swift file that imports Foundation, because it
// defines a bytes field.
// Because InternalImportsByDefault is enabled on this module and we generate
// protos with public visibility, the build will fail if the access level
// modifier is missing (or wrong) since it will default the import to `internal`
// and cause a conflict of access levels, since the `someBytes` property defined
// on the message will be public.

message SomeProtoWithBytes {
  optional bytes someBytes = 2;
  optional string ext_str = 100;
}