docs: public static String concatStrings(final String delimiter, final String... texts) {
          final String delim = delimiter == null ? "" : delimiter;
          final StringBuilder conCatStrBldr = new StringBuilder();
          if (null != texts) {
              for (final String text : texts) {
                  conCatStrBldr.append(delim);
                  conCatStrBldr.append(text);
              }
          }
          final String conCatedStr = conCatStrBldr.toString();
          return delim.length() > 0 && conCatedStr.startsWith(delim) ? conCatedStr.substring(1) : conCatedStr;
      }