private void appendFormattedPlusIfNeeded(PsiElement anchor, StringBuilder out, String commentsBefore) {
        final boolean operationSignOnNextLine =
          CodeStyle.getLanguageSettings(anchor.getContainingFile(), JavaLanguage.INSTANCE).BINARY_OPERATION_SIGN_ON_NEXT_LINE;
        final int lineNumber = getLineNumber(anchor);
        final boolean insertNewLine = currentLine != lineNumber;
        final boolean notEmpty = !out.isEmpty();
        if (notEmpty && !operationSignOnNextLine) {
          out.append(insertNewLine ? '+' + commentsBefore : commentsBefore + '+');
        } else {
          out.append(commentsBefore);
        }
        if (insertNewLine && notEmpty && !hasTrailingLineBreak(out)) {
          out.append("\n "); // space is added to force line reformatting if the next line starts with comment
        }
        if (notEmpty && operationSignOnNextLine) {
          out.append('+');
        }
        currentLine = lineNumber;
      }
private void appendFormattedPlusIfNeeded(PsiElement anchor, StringBuilder out, String commentsBefore)