StreamingState<W extends StatefulWidget> constructor
Attaches mapStream
to StatefullWidget so any recieved updates
causes a rerender.
Optional listenFor
restricts rerenders to only updates to specific keys.
Helpful for reducing unecessary rerendering.
Implementation
StreamingState(MapStream mapStream, [List? listenFor])
: _mapStreamsMap = {mapStream: listenFor},
super();