height property Null safety
The height of the rectangle.
Implementation
T get height => _height;
Sets the height of the rectangle.
The height must be non-negative. If a negative height is supplied, it is clamped to zero.
Setting the value will change the bottom edge of the rectangle, but will not change top.
Implementation
set height(T height) {
if (height < 0) height = _clampToZero<T>(height);
_height = height;
}