windowCount method Null safety
Buffers a number of values from the source Stream by
count then emits
the buffer as a
Stream and clears it, and starts a new buffer each
startBufferEvery values. If
startBufferEvery is not provided, then new
buffers are started immediately at the start of the source and when each
buffer closes and is emitted.
count is the maximum size of the buffer emitted
RangeStream(1, 4) .windowCount(2) .asyncMap((stream) => stream.toList()) .listen(print); // prints [1, 2], [3, 4] done!
startBufferEvery is 2, then a new buffer will be started
on every other value from the source. A new buffer is started at the
beginning of the source by default.
RangeStream(1, 5) .bufferCount(3, 2) .listen(print); // prints [1, 2, 3], [3, 4, 5],  done!
Stream<Stream<T>> windowCount(int count, [int startBufferEvery = 0]) => transform(WindowCountStreamTransformer(count, startBufferEvery));