mygd.horizontalSpan = 3;
mygd.grabExcessHorizontalSpace = true;
mygd.grabExcessVerticalSpace = true;
applicationTree.getControl().setLayoutData(mygd);
applicationTree.setContentProvider(new FBX3WizardContentProvider());
applicationTree.setLabelProvider(new ViewLabelProvider());
applicationTree.setInput(getInitialInput());
//Display our tree dialog with a model.
//the first node is by default, called home or something