nl_tokens: A client of ReadableByteStreamController may use these functions directly to bypass state check .
pl_tokens: function ReadableByteStreamControllerClose ( controller ) { const stream = controller . _controlledReadableStream ; assert ( controller . _closeRequested === false ) ; assert ( stream . _state === 'readable' ) ; if ( controller . _totalQueuedBytes > 0 ) { controller . _closeRequested = <mask> ; return ; } if ( controller . _pendingPullIntos . length > 0 ) { const firstPendingPullInto = controller . _pendingPullIntos [ 0 ] ; if ( firstPendingPullInto . bytesFilled > 0 ) { const e = new TypeError ( 'Insufficient bytes to fill elements in the given buffer' ) ; ReadableByteStreamControllerError ( controller , e ) ; throw e ; } } ReadableStreamClose ( stream ) ; }