singleValue_checkbox = toolkit.createButton( client_general_information, Messages
.getString( "AttributeTypeFormEditorOverviewPage.Single-Value" ), SWT.CHECK ); //$NON-NLS-1$
singleValue_checkbox.setLayoutData( new GridData( SWT.FILL, 0, true, false ) );
// COLLECTIVE Checkbox
toolkit.createLabel( client_general_information, "" ); // Filling the first column //$NON-NLS-1$
collective_checkbox = toolkit.createButton( client_general_information, Messages
.getString( "AttributeTypeFormEditorOverviewPage.Collective" ), SWT.CHECK ); //$NON-NLS-1$
collective_checkbox.setLayoutData( new GridData( SWT.FILL, 0, true, false ) );
// NO-USER-MODIFICATION Checkbox