serialize method
Serialize.
Implementation
@override
void serialize(List<int> buffer) {
// Write type-id 0x1c570ed1.
buffer.writeInt32(0x1c570ed1);
// Write fields.
buffer.writeString(url);
buffer.writeInt64(accessHash);
buffer.writeInt32(size);
buffer.writeString(mimeType);
buffer.writeVectorObject(attributes);
// Finished serialization.
}