func (cdc *Codec) encodeReflectBinaryByteSlice(w io.Writer, info *TypeInfo, rv reflect.Value, fopts FieldOptions) (err error) {
	if printLog {
		fmt.Println("(e) encodeReflectBinaryByteSlice")
		defer func() {
			fmt.Printf("(e) -> err: %v\n", err)
		}()
	}
	ert := info.Type.Elem()
	if ert.Kind() != reflect.Uint8 {
		panic("should not happen")
	}

	// Write byte-length prefixed byte-slice.
	var byteslice = rv.Bytes()
	err = EncodeByteSlice(w, byteslice)
	return
}
func (cdc *Codec) encodeReflectBinaryByteSlice(w io.Writer, info *TypeInfo, rv reflect.Value, fopts FieldOptions) (err error) {
	if printLog {
		fmt.Println("(e) encodeReflectBinaryByteSlice")
		defer func() {
			fmt.Printf("(e) -> err: %v\n", err)
		}()
	}
	ert := info.Type.Elem()
	if ert.Kind() != reflect.Uint8 {
		panic("should not happen")
	}

	// Write byte-length prefixed byte-slice.
	var byteslice = rv.Bytes()
	err = EncodeByteSlice(w, byteslice)
	return
}
// CONTRACT: info.Type.Elem().Kind() == reflect.Uint8