code: public static boolean contains(final boolean caseSensitive, final CharSequence text, final char[] fragment) {
          return contains(caseSensitive, text, 0, text.length(), fragment, 0, fragment.length);
      }
docs: <p>
  Checks whether a text contains a specific fragment.
  </p>
  
  @param caseSensitive whether the comparison must be done in a case-sensitive or case-insensitive way.
  @param text the text to be checked for fragments.
  @param fragment the fragment to be searched.
  @return whether the text contains the fragment or not.