Goのinternalパッケージとははじめに Goのinternalパッケージは、Go1.4で導入されました。 To create such a package, place it in a directory named internal or in a subdirectory of a directory named internal. When the go command sees an import of a package with internal in its path, it verifies that the package doing the import is within the tree rooted at the parent of the internal directory. For example, a package .../a/b/c/internal/d/e/f can be im
