Items within the same row of a Form. The minimum height is useful for enforcing a particular minimum height of a row. The application can set the minimum width or height to any non-negative value. The implementation may enforce implementation-defined maximum values for the minimum width and height. The unlocked preferred width of a Spacer is the same as its current minimum width. Its unlocked preferred height is the same as its current minimum height.
Since a Spacer's primary purpose is to position other items, it is restricted to be non-interactive, and the application is not allowed to add Commands to a Spacer. Since the presence of a label on an Item may affect layout in device-specific ways, the label of a Spacer is restricted to always be null, and the application is not allowed to change it.
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