if ( fileName == null ) throw new IllegalArgumentException( "The file name must not be null" );  Library library = LibraryReader.getInstance( ).read( this, fileName ); libraries.add( library ); return library;
ModuleOption options = null; return openLibrary( fileName, options );
	public Library openLibrary( String fileName ) throws DesignFileException	{		if ( fileName == null )			throw new IllegalArgumentException(					"The file name must not be null" ); //$NON-NLS-1$		Library library = LibraryReader.getInstance( ).read( this, fileName );		libraries.add( library );		return library;	}