// newCodecMsgpackHelper constructs a new CodecMsgpack that may or may
// not handle unknown fields.
func newCodecMsgpackHelper(handleUnknownFields bool) *CodecMsgpack {
handle := codec.MsgpackHandle{}
handle.Canonical = true
handle.WriteExt = true
handle.DecodeUnknownFields = handleUnknownFields
handle.EncodeUnknownFields = handleUnknownFields
// save a codec that doesn't write extensions, so that we can just
// call Encode/Decode when we want to (de)serialize extension
// types.
handleNoExt := handle
handleNoExt.WriteExt = false
extCodec := &CodecMsgpack{&handleNoExt, nil}
return &CodecMsgpack{&handle, extCodec}
}
func codecHandle() *codec.MsgpackHandle {
var mh codec.MsgpackHandle
mh.WriteExt = true
return &mh
}