Interface Marshaler

blobstore/common/rpc/proto.go:100–102

priority of marshaler and unmarshaler (default is json). - - - - - - - - - - - - - - - - - - - - - - | | marshaler | unmarshaler | | higher | | ^ | MarshalerTo | UnmarshalerFrom | | | | Marshaler | Unmarshaler | | | | JSON Marshal| JSON Unmarshal | | lower |

	// can marshal themselves into bytes, second parameter
	// is content type.
	Marshaler interface {
		Marshal() ([]byte, string, error)
	}
	// MarshalerTo is the interface implemented by types that
	// can marshal themselves into writer, the first parameter
	// is content type. (Not Recommended).