Method replacePrefix

src/main/java/net/optifine/util/StrUtils.java:566–589

(String str, String prefix, String prefixNew)

    }

    public static String replacePrefix(String str, String prefix, String prefixNew)
    {
        if (str != null && prefix != null)
        {
            if (!str.startsWith(prefix))
            {
                return str;
            }
            else
            {
                if (prefixNew == null)
                {
                    prefixNew = "";
                }

                str = str.substring(prefix.length());
                return prefixNew + str;
            }
        }
        else
        {
            return str;
        }
    }

    public static int findPrefix(String[] strs, String prefix)
    {