private void handleMouseClick(MouseEvent e) {
			if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 2) {
				int row = table.rowAtPoint(e.getPoint());
				if (row < 0) {
					return;
				}
				open();
			}
		}
Set up the drag and drop stuff.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/datatree/VersionHistoryPanel.java