NPRPC docs

function createByteStreamYielder

Swift

func createByteStreamYielder(streamId: UInt64, buffer: FlatBuffer, sendChunk: @escaping (FlatBuffer) -> Void, sendComplete: @escaping (UInt64, UInt64) -> Void) -> StreamYielder<UInt8>

Helper to create a byte stream yielder (most common case)

nprpc_swift/Sources/NPRPC/StreamReader.swift:833