writeFrom abstract method
Writes from a buffer to the file.
Will read the buffer from index start to index end.
The start must be non-negative and no greater than buffer.length.
If end is omitted, it defaults to buffer.length.
Otherwise end must be no less than start
and no greater than buffer.length.
Returns a Future<RandomAccessFile> that completes with this
RandomAccessFile when the write completes.
Implementation
Future<RandomAccessFile> writeFrom(
List<int> buffer, [
int start = 0,
int? end,
]);