The DOM or screen-space rectangle that defines the anchor area.
The location within the rectangle that should act as the anchor
(e.g., topRight, bottomLeft, center, etc.).
For example, topRight means the rectangle's top-right corner is used
as the anchoring reference point.
Represents an anchor configuration consisting of a bounding rectangle and an anchor point describing which part of that rectangle should be used as the reference for positioning the download bubble.