What is the onPressed function in a Flutter container?

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The onPressed function in a Flutter container is a type of callback function that is triggered when the user presses down on the container. This is commonly used in buttons or clickable elements, such as a GestureDetector, to perform a specific action, such as navigating to another screen or changing the state of the widget. The onPressed function takes a function parameter, which is executed when the user presses down on the container.