Writes a single byte to the file. Returns a Future<RandomAccessFile>
that completes with this RandomAccessFile when the write completes.
Future<RandomAccessFile> writeByte(int value);
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-io/RandomAccessFile/writeByte.html