void initState() @mustCallSuper, @protected. Called when this object is inserted into the tree . The framework will call this method exactly once for each State object it creates.
Read moreWhat is a Statelesswidget?
Stateless Widget: The widgets whose state can not be altered once they are built are called stateless widgets. These widgets are immutable once they are built i.e any amount of change in the variables, icons, buttons, or retrieving data can not change the state of the app.
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