Represents an item within a PositionableContainer that a Layout can position.
The top, left, width, and height.
Vertical extent of bounds
Size that would best display this item, or null if no preference
null
Minimum size preferred by this item
Top-left corner of bounds
Width-height of bounds
Whether this item is visible.
Horizontal extent of bounds
Left edge of bounds
Top edge of bounds
Checks whether this item contains point.