private boolean showSingleLineFolding(@NotNull Document document, @NotNull String contents, @NotNull String header) {
    return contents.indexOf('\n') < 0 &&
                      myBuilder.fitsRightMargin(myAnonymousClass, document, getClosureStartOffset(), getClosureEndOffset(), header.length() + contents.length() + 5);
  }
private boolean showSingleLineFolding(@NotNull Document document, @NotNull String contents, @NotNull String header)