In BorderLayoutContainer, I have added a panel widget with borderLayoutData.

If use the below BorderLayoutData, when I click the north border, the float of the widget is not displayed:
Code:
           BorderLayoutData northGraphData = new BorderLayoutData(150);	    northGraphData.setCollapsible(true);
	    northGraphData.setMargins(new Margins(0, 5, 0, 5));
	    northGraphData.setSize(300);
	    northGraphData.setFloatable(true);
If I use the below BorderLayoutData, when I click the north border, the float is displayed:
Code:
	    BorderLayoutData northGraphData = new BorderLayoutData(150);
	    northGraphData.setCollapsible(true);
	    northGraphData.setCollapseMini(true);
	    northGraphData.setMargins(new Margins(0, 5, 0, 5));
	    northGraphData.setSize(300);
	    northGraphData.setFloatable(true);
The only difference is setting collapseMini which shouldn't matter.