Flutter - how to remove default padding (48 px as per doc) from widgets (IconButton, CheckBox, FlatButton) - Stack Overflow

I am facing a problem with the default padding of the widgets (IconButton, CheckBox, FlatButton). I have searched a lot for this concern but with no success. In the above image, the outer blue rec

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Flutter - how to remove default padding (48 px as per doc) from

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Flutter - how to remove default padding (48 px as per doc) from

Flutter) How can I remove this space(padding) in this screen