for (String edge : edges) {
      checkArgument(
          edge.length() == 2, "Expecting each edge to consist of 2 characters but got %s", edge);
      char node1 = edge.charAt(0);
      char node2 = edge.charAt(1);
      graphMapBuilder.put(node1, node2);
      if (!directed) {
        graphMapBuilder.put(node2, node1);
      }
    }

    for (String edge : edges) {
      checkArgument(
          edge.length() == 2, "Expecting each edge to consist of 2 characters but got %s", edge);
      char node1 = edge.charAt(0);
      char node2 = edge.charAt(1);
      graphMapBuilder.put(node1, node2);
      if (!directed) {
        graphMapBuilder.put(node2, node1);
      }
    }

        Integer.class,
        long.class,
        Long.class,
        short.class,
        Short.class,
        byte.class,
        Byte.class,
        boolean.class,
        Boolean.class,
        char.class,
        Character.class,
        int[].class,
        Object[].class,
        UnsignedInteger.class,
        UnsignedLong.class,
        BigInteger.class,
        BigDecimal.class,

     */
    private String createTestString(int length) {
        StringBuilder sb = new StringBuilder(length);
        for (int i = 0; i < length; i++) {
            sb.append((char) ('A' + (i % 26)));
        }
        return sb.toString();
    }

    /**
     * Helper method to create a mock Type 2 message with target information for NTLMv2
     */

    }

    static boolean isDotQuadIP(final String hostname) {
        if (hostname != null && hostname.length() > 0 && Character.isDigit(hostname.charAt(0))) {
            int i, len, dots;
            char[] data;

            i = dots = 0; /* quick IP address validation */
            len = hostname.length();
            data = hostname.toCharArray();
            while (i < len && Character.isDigit(data[i++])) {

        // Prepare test data with long filename (255 characters)
        StringBuilder longName = new StringBuilder();
        for (int i = 0; i < 255; i++) {
            longName.append((char) ('a' + (i % 26)));
        }
        String expectedFilename = longName.toString();
        byte[] buffer = createValidBuffer(expectedFilename, "LONGNA~1.TXT", true);

        // Decode

    // A more organic OOM from a toString implementation
    Object object =
        new Object() {
          @Override
          public String toString() {
            return new String(new char[50_000]);
          }
        };
    List<Object> list = Collections.singletonList(object);
    for (int i = 0; i < 10; i++) {
      Object[] array = new Object[500];
      Arrays.fill(array, list);

          params[i] = ArbitraryInstances.get(sig.get(i));
        }
      }
    }
    return params;
  }

  private static final ImmutableList<Class<?>> POSSIBLE_PARAM_TYPES =
      ImmutableList.of(char.class, int.class, long.class, Object.class);

  /**
   * Returns a list of parameters for invoking an overload of checkState, checkArgument or
   * checkNotNull
   *

          params[i] = ArbitraryInstances.get(sig.get(i));
        }
      }
    }
    return params;
  }

  private static final ImmutableList<Class<?>> POSSIBLE_PARAM_TYPES =
      ImmutableList.of(char.class, int.class, long.class, Object.class);

  /**
   * Returns a list of parameters for invoking an overload of checkState, checkArgument or
   * checkNotNull
   *

   *         .collect(
   *             flatteningToImmutableListMultimap(
   *                  str -> str.charAt(0),
   *                  str -> str.substring(1).chars().mapToObj(c -> (char) c));
   *
   * // is equivalent to
   *
   * static final ImmutableListMultimap<Character, Character> FIRST_LETTER_MULTIMAP =
   *     ImmutableListMultimap.<Character, Character>builder()