构造方法
Constructor	描述
`CurrentHelper()`

所有方法静态方法具体的方法
Modifier and Type	方法	描述
`static Current`	`extract(Any a)`
`static String`	`id()`
`static void`	`insert(Any a, Current that)`
`static Current`	`narrow(Object obj)`
`static Current`	`read(InputStream istream)`
`static TypeCode`	`type()`
`static void`	`write(OutputStream ostream, Current value)`

public static void insert(Any a,
                          Current that)

public static Current extract(Any a)

public static Current read(InputStream istream)

public static void write(OutputStream ostream,
                         Current value)

public static Current narrow(Object obj)

Class CurrentHelper