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Just had one of those ‘reinventing the wheel’ moments in Flutter: 🤯 Did you know that Spacer is literally just an Expanded with a SizedBox.shrink as its child? That’s it. I never thought about how simple its implementation could be until I checked the source code.

Essentially, Spacer uses Expanded to occupy flexible space in a Row, Column, or Flex, and the SizedBox.shrink ensures it doesn’t take up any visual space. Simple and brilliant.