split.setResizeWeight(0.75);
split.setOpaque(false);
split.setDividerSize(4);
split.setLeftMinimumSize(new Dimension(50, 50));
split.setLeftComponent(left);
SectionedSplitPane sections = new SectionedSplitPane(split);
sections.setIncludeControlPanelInLayout(false);
sections.setOpaque(false);
return sections;
}