ReadableStreamDefaultReader

interface ReadableStreamDefaultReader <R = any> {
    

readonly closed: Promise<void>;

    
    
cancel(reason?: any): Promise<void>;

    
    
read(): Promise<ReadableStreamReadResult<R>>;

    
    
releaseLock(): void;

    
}

var ReadableStreamDefaultReader: {
      

       prototype: ReadableStreamDefaultReader; 
      

      

       new <R>(stream: ReadableStream<R>): ReadableStreamDefaultReader<R>; 
      
};