// 値が存在するか確認
class func isSearchHistory() -> Bool {
	return UserDefaults.standard.object(forKey: "search_history") != nil
}

// userdefaults 配列
class internal func getSearchHistory() -> [String]{
	return (UserDefaults.standard.array(forKey: "search_history") as? [String])!
}
class internal func setSearchHistory(_ filepath:[String]) -> Void{
	UserDefaults.standard.set(filepath, forKey: "search_history")
}