private void addFiller(final Composite composite, final int horizontalSpan) {
final PixelConverter pixelConverter = new PixelConverter(composite);
final Label filler = new Label(composite, SWT.LEFT);
final GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gd.horizontalSpan = horizontalSpan;
gd.heightHint = pixelConverter.convertHeightInCharsToPixels(1) / 2;
filler.setLayoutData(gd);
}
public static String loadPreviewContentFromFile(final Class<?> clazz,
final String filename) {