Data (@Nullable List<? extends LineRange> changedLines, @NotNull Settings settings, @NotNull Document document, @NotNull LineNumberConvertor lineConvertor, int lineCount) { Iterator<int[]> it = map(changedLines, line -> new int[]{ line.start, line.end }); if (it == null || settings.range == -1) return null; myLineNumberConvertor = new DisposableLineNumberConvertor(lineConvertor); MyFoldingBuilder builder = new MyFoldingBuilder(document, myLineNumberConvertor, lineCount, settings); return builder.build(it); }