serialize method
Serialize.
Implementation
@override
void serialize(List<int> buffer) {
// Write type-id 0x9bed434d.
buffer.writeInt32(0x9bed434d);
// Write fields.
buffer.writeString(url);
buffer.writeInt32(size);
buffer.writeString(mimeType);
buffer.writeVectorObject(attributes);
// Finished serialization.
}