public static File notHidden(final File file) {
exists(file);
if (file.isHidden())
throw new FileRuntimeException("File is hidden: " + file.getAbsolutePath());
return file;
}
public static File file(final File file) {
exists(file);
if (!file.isFile()) throw new FileRuntimeException("Not a file: " + file.getAbsolutePath());
return file;
}