code: public static final Function<String, Boolean> startsWith(final String prefix, final int offset) {
          return new StartsWith(prefix, offset);
      }
docs: <p>
  It checks whether the input substring after the given offset starts
  with the given prefix or not.
  </p>
  
  @param prefix the prefix to be search after the specified offset
  @param offset where to begin looking for the prefix
  @return