form.setMessage("Specify how the elements should be structured",
IMessageProvider.INFORMATION);
toolkit.decorateFormHeading(form);
form.getBody().setLayout(new GridLayout());
Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR);
section.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
section.setText("Groups");
Composite parent = toolkit.createComposite(section);
parent.setLayout(new GridLayout(3, false));