Constructors
 Properties
popups
 Methods
addPopup
- addPopup(popup: Tooltip): void
 Returns void
doPopupsOverlap
- doPopupsOverlap(popupA: Tooltip, popupB: Tooltip): boolean
 Returns boolean
removePopup
- removePopup(popup: Tooltip): void
 Returns void
updatePopups
- updatePopups(): void
 Returns void