issue435

type Message struct {
	NonnullableOptional  SubMessage   `protobuf:"bytes,1,opt,name=nonnullable_optional,json=nonnullableOptional" json:"nonnullable_optional"`
	NonnullableRepeated  []SubMessage `protobuf:"bytes,2,rep,name=nonnullable_repeated,json=nonnullableRepeated" json:"nonnullable_repeated"`
	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
	XXX_unrecognized     []byte       `json:"-"`
	XXX_sizecache        int32        `json:"-"`
}

type SubMessage struct {
	Value                *int64   `protobuf:"varint,1,opt,name=value,def=7" json:"value,omitempty"`
	XXX_NoUnkeyedLiteral struct{} `json:"-"`
	XXX_unrecognized     []byte   `json:"-"`
	XXX_sizecache        int32    `json:"-"`
}