The runApp() function should return widget that would be attached to the screen as a root of the widget Tree that will be rendered .20 Tem 2020
Read moreWhat is Flutter widget?
Widgets are the central class hierarchy in the Flutter framework . A widget is an immutable description of part of a user interface. Widgets can be inflated into elements, which manage the underlying render tree. Widgets themselves have no mutable state (all their fields must be final).
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