Flutter Text Widget has a lot of attributes but here we will focus only on overflow param.
StreamGroup is a class which contains n number of stream and execute simultaneously. This is managed by a central stream of StreamGroup.
StreamQueue contains Stream which executes in Queue format i.e FIFO(First In First Out).
FutureGroup provides us the functionality of combining multiple futures into one single group, which will give the callback at the end when all future tasks work gets completed.