Container for splitting and adjusting. Container for splitting two controls vertically or horizontally, with a grabber that allows adjusting the split offset or ratio. Return visibility of the split dragger (one of [DRAGGER_VISIBLE], [DRAGGER_HIDDEN] or [DRAGGER_HIDDEN_COLLAPSED]). Return the split offset. Return true if the split is collapsed. Set if the split must be collapsed. Set visibility of the split dragger ([i]mode[/i] must be one of [DRAGGER_VISIBLE], [DRAGGER_HIDDEN] or [DRAGGER_HIDDEN_COLLAPSED]). Set the split offset. Emitted when the dragger is dragged by user. The split dragger is visible. The split dragger is invisible. The split dragger is invisible and collapsed.