A panel that adds user-positioned splitters between each of its child widgets.
This panel is used in the same way as {@link DockLayoutPanel}, except that its children's sizes are always specified in {@link Unit#PX} units, and eachpair of child widgets has a splitter between them that the user can drag.
This widget will only work in standards mode, which requires that the HTML page in which it is run have an explicit <!DOCTYPE> declaration.
NOTE: This class is still very new, and its interface may change without warning. Use at your own risk.
Example
{@example com.google.gwt.examples.SplitLayoutPanelExample} TODO(jgw): - RTL Support. - implement insert(). - Come up with a decent way to specify splitter style and size.