serialize method
Serialize.
Implementation
@override
void serialize(List<int> buffer) {
// Write type-id 0x40181ffe.
buffer.writeInt32(0x40181ffe);
// Write fields.
buffer.writeInt64(id);
buffer.writeInt64(accessHash);
buffer.writeBytes(fileReference);
buffer.writeString(thumbSize);
// Finished serialization.
}