public void appendText(char[] formattedValue) {
        if (appendedText.length > 0) {
            System.arraycopy(appendedText, 0, formattedValue, formattedValue.length - appendedText.length,
                    appendedText.length);
        }
    }
@see #formatFloatValueWithPrependedAndAppendedText(char[], float, int, char[])
hellocharts-library/src/lecho/lib/hellocharts/formatter/ValueFormatterHelper.java