Steams and Stream builder and controller demo #60
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Streams and Streambuilder Demo with controllers and Stream subscription use cases.
how the Streams work in flutter is given in this gist you can have a look at this to learn about streams it is one of the complicated concepts in the flutter.
Link to dartpad :
https://dartpad.dev/b38bbafcb81d87adb608cb12e3a282b4
with gif added as well