Determines if the given template argument is some form of output stream,
where an output stream is anything with a write method that takes a single
array parameter, and returns an integer number of elements that were read,
or -1 in case of error. This method does not care about the type of elements
that can be read by the stream.
Determines if the given template argument is some form of output stream, where an output stream is anything with a write method that takes a single array parameter, and returns an integer number of elements that were read, or -1 in case of error. This method does not care about the type of elements that can be read by the stream.