code: public static Matcher<CharSequence> sliceThat(int start, int end, Matcher<CharSequence> matcher) {
          return CharSequenceSliceMatcher.sliceThat(start, end, matcher);
      }
docs: Match in range <tt>start</tt>, <tt>end</tt> inclusive
  @see CharSequenceSliceMatcher#sliceThat(int, int, Matcher)
  @param start the slice start, inclusive, can be negative
  @param end the slice end, inclusive, can be negative
  @param matcher the nested matcher to use with the slice
  @return the matcher