GithubProjectModelMirrorRefPath typedef
GithubProjectModelMirrorRefPath = _$GithubProjectModelMirrorRefPath
It can be defined as an empty ModelRef<GithubProjectModel>.
GithubProjectModelMirrorRefPath("xxx") // Define as a path.
Implementation
typedef GithubProjectModelMirrorRefPath = _$GithubProjectModelMirrorRefPath;