Indicates if the popover should pop in the downwards direction or not. If not, it should pop in the upwards direction. This is determined by how much space is available on either vertical side of the root element.
Indicates if the popover should pop in the rightwards direction or not. If not, it should pop in the leftwards position. This is determined by how much space is available on either horizontal side of the root element.
Output type from
PopoverManager.showPopover