package Ġcom . ray w ender lich . android . men ager ie . preferences Ċ Ċ interface ĠMen ager ie Preferences Ġ{ ĊĊĠ Ġfun Ġis User LoggedIn (): ĠBoolean ĊĊĠ Ġfun ĠsetUser LoggedIn ( is LoggedIn : ĠBoolean ) Ċ }