StackChildData constructor
Creates positioning metadata in whole terminal cells.
Implementation
const StackChildData({
this.left,
this.top,
this.right,
this.bottom,
this.width,
this.height,
}) : assert(width == null || width >= 0),
assert(height == null || height >= 0),
assert(left == null || right == null || width == null),
assert(top == null || bottom == null || height == null);