Where is Pubspec Yaml?

yaml file, often referred to as the pubspec. A basic pubspec is generated when you create a new Flutter project. It’s located at the top of the project tree and contains metadata about the project that the Dart and Flutter tooling needs to know.

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What is DART UI?

Built-in types and core primitives for a Flutter application . To use, import dart:ui . This library exposes the lowest-level services that Flutter frameworks use to bootstrap applications, such as classes for driving the input, graphics text, layout, and rendering subsystems.

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