}

    fun setPathSegment(
      index: Int,
      pathSegment: String,
    ) = apply {
      val canonicalPathSegment = pathSegment.canonicalize(encodeSet = PATH_SEGMENT_ENCODE_SET)
      require(!isDot(canonicalPathSegment) && !isDotDot(canonicalPathSegment)) {
        "unexpected path segment: $pathSegment"
      }
      encodedPathSegments[index] = canonicalPathSegment
    }

    fun setEncodedPathSegment(

      return "CharMatcher.is('" + showCharacter(match) + "')";
    }
  }

  /** Implementation of {@link #isNot(char)}. */
  private static final class IsNot extends FastMatcher {

    private final char match;

    IsNot(char match) {
      this.match = match;
    }

    @Override
    public boolean matches(char c) {
      return c != match;
    }

    @Override