You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: method_twin_sync.rs
    path of file: ./repos/flutter_rust_bridge/frb_example/pure_dart/rust/src/api/pseudo_manual
    
    the code of the file until where you have to start completion: // NOTE: This file is mimicking how a human developer writes tests,
// and is auto-generated from `method.rs` by frb_internal
// Please do not modify manually, but modify the origin and
    
    pub fn handle_some_stream_sink_at_1_twin_sync(&self, sink: StreamSink<u32>) {
        (FLUTTER_RUST_BRIDGE_HANDLER.thread_pool()).execute(transfer!(|| {
            for i in 0..5 {
                sink.add(i).unwrap();
            }
        }));
    }