Comparable<?>[] contents = new Comparable<?>[6 + remaining.length];
    contents[0] = e1;
    contents[1] = e2;
    contents[2] = e3;
    contents[3] = e4;
    contents[4] = e5;
    contents[5] = e6;
    System.arraycopy(remaining, 0, contents, 6, remaining.length);
    return construct(Ordering.natural(), contents.length, (E[]) contents);
  }

      requireNonNull(contents); // see the comment on the field
      if (occurrences == 0) {
        return this;
      }
      if (buildInvoked) {
        contents = new ObjectCountHashMap<E>(contents);
        isLinkedHash = false;
      }
      buildInvoked = false;
      checkNotNull(element);
      contents.put(element, occurrences + contents.get(element));
      return this;
    }

type Buffer struct {
	buf      []byte // contents are the bytes buf[off : len(buf)]
	off      int    // read at &buf[off], write at &buf[len(buf)]
	lastRead readOp // last read operation, so that Unread* can work correctly.
}

// The readOp constants describe the last action performed on
// the buffer, so that UnreadRune and UnreadByte can check for
// invalid usage. opReadRuneX constants are chosen such that

    final Multiset<E> contents;

    /**
     * Creates a new builder. The returned builder is equivalent to the builder generated by {@link
     * ImmutableMultiset#builder}.
     */
    public Builder() {
      this(LinkedHashMultiset.<E>create());
    }

    Builder(Multiset<E> contents) {
      this.contents = contents;
    }

    /**

    val expected =
      """
      |--AaB03x
      |Content-Disposition: form-data; name="submit-name"
      |
      |Larry
      |--AaB03x
      |Content-Disposition: form-data; name="files"
      |Content-Type: multipart/mixed; boundary=BbC04y
      |
      |--BbC04y
      |Content-Disposition: file; filename="file1.txt"
      |Content-Type: text/plain; charset=utf-8
      |

    copyTo(Funnels.asOutputStream(hasher));
    return hasher.hash();
  }

  /**
   * Checks that the contents of this byte source are equal to the contents of the given byte
   * source.
   *
   * @throws IOException if an I/O error occurs while reading from this source or {@code other}
   */
  public boolean contentEquals(ByteSource other) throws IOException {
    checkNotNull(other);

        assertThat(q).containsExactlyElementsIn(contents);
        q.add(next);
        contents.add(next);
        assertThat(q).containsExactlyElementsIn(contents);
        q.remove(i);
        assertTrue(contents.remove(Integer.valueOf(i)));
        assertThat(q).containsExactlyElementsIn(contents);
        assertEquals(next, q.poll());
        contents.remove(next);

    }

    private void getReadyToExpandTo(int minCapacity) {
      if (contents.length < minCapacity) {
        this.contents = Arrays.copyOf(contents, expandedCapacity(contents.length, minCapacity));
        forceCopy = false;
      } else if (forceCopy) {
        contents = Arrays.copyOf(contents, contents.length);
        forceCopy = false;
      }
    }

    /**

        assertThat(q).containsExactlyElementsIn(contents);
        q.add(next);
        contents.add(next);
        assertThat(q).containsExactlyElementsIn(contents);
        q.remove(i);
        assertTrue(contents.remove(Integer.valueOf(i)));
        assertThat(q).containsExactlyElementsIn(contents);
        assertEquals(next, q.poll());
        contents.remove(next);

     */
    private void getReadyToExpandTo(int minCapacity) {
      if (contents.length < minCapacity) {
        this.contents =
            Arrays.copyOf(this.contents, expandedCapacity(contents.length, minCapacity));
        forceCopy = false;
      } else if (forceCopy) {
        this.contents = contents.clone();
        forceCopy = false;
      }
    }

    @CanIgnoreReturnValue