nl_tokens: A client of ReadableStreamDefaultController may use these functions directly to bypass state check .
pl_tokens: function ReadableStreamDefaultControllerClose ( controller ) { const stream = controller . _controlledReadableStream ; assert ( controller . _closeRequested === false ) ; assert ( stream . _state === 'readable' ) ; controller . _closeRequested = true ; if ( <mask> . _queue . length === 0 ) { ReadableStreamClose ( stream ) ; } }