decorator.addEditorControl( radioButtonsComposite );
this.radioButtonGroup = new ArrayList<Button>();
final String arbitraryValueLabel
= property.getLocalizationService().text( namedValuesAnnotation.arbitraryValueLabel(), CapitalizationType.FIRST_WORD_ONLY, true ) + ":";
this.arbitraryValueRadioButton = createRadioButton( radioButtonsComposite, arbitraryValueLabel );
this.arbitraryValueRadioButton.setLayoutData( gd() );
this.arbitraryValueRadioButton.addSelectionListener( selectionListener );
this.radioButtonGroup.add( this.arbitraryValueRadioButton );