getVideoMidForUser method
Implementation
String getVideoMidForUser(int userId) {
var videoMid = '';
subStreams.forEach((mid1, value) {
if (value == userId) {
streamTypes.forEach((mid2, type) {
if (mid1 == mid2 && type == STREAM_KIND_VIDEO) {
videoMid = mid2;
}
});
}
});
return videoMid;
}