extensionsComposite.setLayoutData(data);
GridLayout layout = new GridLayout();
layout.marginTop = 0;
layout.numColumns = 1;
extensionsComposite.setLayout(layout);
fieldEditor = new FieldExtensionEditor("fieldEditor", extensionsComposite);
fieldEditor.getLabelControl(extensionsComposite).setBackground(Display.getDefault().getSystemColor(SWT.COLOR_WHITE));
CLabel extensionLabel = factory.createCLabel(composite, "Fields:"); //$NON-NLS-1$
data = new FormData();
data.left = new FormAttachment(0, 0);