code: public static boolean contentEquals(CharSequence a, CharSequence b) {
          if (a == null || b == null) {
              return a == b;
          }
  
          if (a.getClass() == AsciiString.class) {
              return ((AsciiString) a).contentEquals(b);
          }
  
          if (b.getClass() == AsciiString.class) {
              return ((AsciiString) b).contentEquals(a);
          }
  
          if (a.length() != b.length()) {
              return false;
          }
          for (int i = 0; i <  a.length(); ++i) {
              if (a.charAt(i) != b.charAt(i)) {
                  return false;
              }
          }
          return true;
      }
docs: Returns {@code true} if the content of both {@link CharSequence}'s are equals. This only supports 8-bit ASCII.