if (fNlsHolder.getSubstitutions().length == 0) {
if (fSubstitutions.length == 0) {
    public RefactoringStatus checkInitialConditions(IProgressMonitor pm) throws CoreException {        if (fNlsHolder.getSubstitutions().length == 0) {            String message = NLSMessages.getFormattedString("NLSRefactoring.no_strings", fCu.getElementName());//$NON-NLS-1$            return RefactoringStatus.createFatalErrorStatus(message);        }        return new RefactoringStatus();    }