method ReadableStream.getReader
          
Private
ReadableStream.getReader(options: { mode: "byob";  }): ReadableStreamBYOBReader 
      
ReadableStream.getReader(): ReadableStreamDefaultReader<R> 
      
ReadableStream.getReader(options?: ReadableStreamGetReaderOptions): ReadableStreamReader<R> 
      optional
options: ReadableStreamGetReaderOptions