type Codec interface {
	io.Closer
	ReadHeader(*Header) error
	ReadBody(interface{}) error
	Write(*Header, interface{}) error
}

type GobCodec struct {}

// Verify that *T implements I.
var _ Codec = (*GobCodec)(nil)

func (c *GobCodec) ReadHeader(h *Header) error {}

func (c *GobCodec) ReadBody(body interface{}) error {}

func (c *GobCodec) Write(h *Header, body interface{}) (err error) {}

func (c *GobCodec) Close() error {}

var _ I = (*T)(nil) // Verify that *T implements I.