ALIGN_ANCHOR

Align depending on the position of an anchor.

For example, Balloon.Builder.arrowOrientation is ArrowOrientation.TOP and we want to show up the balloon under an anchor using the Balloon.showAlignBottom. However, if there is not enough free space to place the tooltip at the bottom of the anchor, tooltips will be placed on top of the anchor and the orientation of the arrow will be ArrowOrientation.BOTTOM.