go/src/encoding/gob/example_encdec_test.go

type Vector …

func (v Vector) MarshalBinary() ([]byte, error) { … }

// UnmarshalBinary modifies the receiver so it must take a pointer receiver.
func (v *Vector) UnmarshalBinary(data []byte) error { … }

// This example transmits a value that implements the custom encoding and decoding methods.
func Example_encodeDecode() { … }