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