Function isOrBecomesClosed

examples/io/streams/modules/streams.js:922–928

(stream, promise, action)

		}

		function isOrBecomesClosed(stream, promise, action) {
			if (stream.state === 'closed') {
				action();
			} else {
				promise.then(action).catch(ignoreReason);
			}
		}

		function shutdownWithAction(action, originalIsError, originalError) {
			if (shuttingDown === true) {