Each point within a chart can be in several states. These states are represented by the numbers that are enumerated in the list below:
The point is not hovered and not selected (normal state);
The point is hovered;
The point is selected;
The point is hovered and selected.
You can also use the isHovered() and isSelected() point methods to check whether a point is hovered or selected.
For information on members that a series object exposes, refer to the Series object description.
Contains the size of the bubble as it was set in the data source. This field is useful for points belonging to a series of the bubble type only.