private boolean sawReturn;

  /**
   * Process additional characters from the stream. When a line separator is found the contents of
   * the line and the line separator itself are passed to the abstract {@link #handleLine} method.
   *
   * @param cbuf the character buffer to process
   * @param off the offset into the buffer
   * @param len the number of characters to process
   * @throws IOException if an I/O error occurs

    String msg = "plusForSpace cannot be specified when space is a 'safe' character";
    IllegalArgumentException expected =
        assertThrows(IllegalArgumentException.class, () -> new PercentEscaper(" ", true));
    assertThat(expected).hasMessageThat().isEqualTo(msg);
  }

  /** Helper to manually escape a 7-bit ascii character */
  private String escapeAscii(char c) {
    Preconditions.checkArgument(c < 128);

    super(false, false, false, false, false);
  }

  @Override
  Table<String, Character, Integer> makeTable() {
    RowSortedTable<String, Character, Integer> table = TreeBasedTable.create();
    return unmodifiableRowSortedTable(table);
  }

  @Override
  protected Map<String, Integer> makePopulatedMap() {
    RowSortedTable<String, Character, Integer> table = TreeBasedTable.create();
    table.put("one", 'a', 1);

    super(false, false, false, false, false);
  }

  @Override
  Table<String, Character, Integer> makeTable() {
    Table<String, Character, Integer> table = HashBasedTable.create();
    return unmodifiableTable(table);
  }

  @Override
  protected Map<String, Integer> makePopulatedMap() {
    Table<String, Character, Integer> table = HashBasedTable.create();
    table.put("one", 'a', 1);
    table.put("two", 'a', 2);

            .and(Equivalence.equals());
    ImmutableSetMultimap<Character, Character> empty = ImmutableSetMultimap.of();
    ImmutableSetMultimap<Character, Character> filled =
        ImmutableSetMultimap.<Character, Character>builder()
            .putAll('b', Arrays.asList('a', 'n', 'a', 'n', 'a'))
            .putAll('a', Arrays.asList('p', 'p', 'l', 'e'))

    }

    private static final long serialVersionUID = 0;
  }

  @Override
  protected Table<String, Integer, Character> create(@Nullable Object... data) {
    TestTable<String, Integer, Character> table = new TestTable<>();
    Table<String, Integer, Character> synced = Synchronized.table(table, table.mutex);
    populate(synced, data);
    return synced;
  }

            }
            size--;
        }
    }

    /**
     * Converts a long value to hexadecimal characters and writes them to the specified character array.
     *
     * @param val the long value to convert to hexadecimal characters
     * @param dst the destination character array to write the hex digits into
     * @param dstIndex the starting index in the destination array

                }
            }
        }
        return out.toString();
    }

    /**
     * <p>Returns an upper case hexadecimal <code>String</code> for the given
     * character.</p>
     *
     * @param ch The character to convert.
     * @return An upper case hexadecimal <code>String</code>
     */
    protected static String hex(char ch) {
        return Integer.toHexString(ch).toUpperCase(Locale.ENGLISH);

                }
            }
        }
        return out.toString();
    }

    /**
     * <p>Returns an upper case hexadecimal <code>String</code> for the given
     * character.</p>
     *
     * @param ch The character to convert.
     * @return An upper case hexadecimal <code>String</code>
     */
    protected static String hex(char ch) {
        return Integer.toHexString(ch).toUpperCase(Locale.ENGLISH);

    /**
     * The URL for the HTTP request.
     */
    protected String url;

    /**
     * The proxy to be used for the HTTP request.
     */
    protected Proxy proxy;

    /**
     * The character encoding for the request.
     */
    protected String encoding = "UTF-8";

    /**
     * The threshold size for the request body.
     */
    protected int threshold = 1024 * 1024; // 1MB

    /**