dos.writeInt(Integer.reverseBytes(16));
            dos.writeLong(Long.reverseBytes(300));

            // Add some padding
            for (int i = 0; i < 300; i++) {
                dos.writeByte(0);
            }

            return baos.toByteArray();
        } catch (IOException e) {
            throw new PACDecodingException("Failed to create test data", e);
        }
    }

		var newSQL strings.Builder

		for _, v := range []byte(sql) {
			if v == '?' {
				if len(vars) > idx {
					newSQL.WriteString(vars[idx])
					idx++
					continue
				}
			}
			newSQL.WriteByte(v)
		}

		sql = newSQL.String()
	} else {
		sql = numericPlaceholder.ReplaceAllString(sql, "$$$1$$")

		sql = numericPlaceholderRe.ReplaceAllStringFunc(sql, func(v string) string {

		n, err := buf.Write(testBytes[0:1])
		if want := 1; err != nil || n != want {
			t.Errorf("Write: got (%d, %v), want (%d, %v)", n, err, want, nil)
		}
		check(t, "TestBasicOperations (4)", &buf, "a")

		buf.WriteByte(testString[1])
		check(t, "TestBasicOperations (5)", &buf, "ab")

		n, err = buf.Write(testBytes[2:26])
		if want := 24; err != nil || n != want {
			t.Errorf("Write: got (%d, %v), want (%d, %v)", n, err, want, nil)

              @Throws(
                IOException::class,
              )
              override fun writeTo(sink: BufferedSink) {
                for (i in 0..9) {
                  sink.writeByte(0)
                  sink.flush()
                  sleep(100)
                }
                fail("Expected connection to be closed")
              }
            },
        ),
      )

     */
    fun concatLengthPrefixed(protocols: List<Protocol>): ByteArray {
      val result = Buffer()
      for (protocol in alpnProtocolNames(protocols)) {
        result.writeByte(protocol.length)
        result.writeUtf8(protocol)
      }
      return result.readByteArray()
    }
  }

		}
		nn += n
		p = p[n:]
	}
	if b.err != nil {
		return nn, b.err
	}
	n := copy(b.buf[b.n:], p)
	b.n += n
	nn += n
	return nn, nil
}

// WriteByte writes a single byte.
func (b *Writer) WriteByte(c byte) error {
	if b.err != nil {
		return b.err
	}
	if b.Available() <= 0 && b.Flush() != nil {
		return b.err
	}
	b.buf[b.n] = c
	b.n++
	return nil
}

	var buf bytes.Buffer
	for _, k := range headers {
		buf.WriteString(k)
		buf.WriteByte(':')
		switch k {
		case "host":
			buf.WriteString(req.URL.Host)
			fallthrough
		default:
			for idx, v := range headerMap[k] {
				if idx > 0 {
					buf.WriteByte(',')
				}
				buf.WriteString(v)
			}
			buf.WriteByte('\n')
		}
	}
	canonicalHeaders := buf.String()

	// Get signed headers.

	// Read value
	for {
		v, err := cr.reader.ReadByte()
		if err != nil {
			if err == io.EOF {
				return io.ErrUnexpectedEOF
			}
		}
		if v != '\r' {
			valueBuffer.WriteByte(v)
			continue
		}
		// End of buffer, do not add to value.
		v, err = cr.reader.ReadByte()
		if err != nil {
			if err == io.EOF {
				return io.ErrUnexpectedEOF
			}
		}
		if v != '\n' {

		return fmt.Sprintf("\"%s\":%s", x, v.GetTypeString())
	case []byte:
		return fmt.Sprintf("\"%s\":BYTES", string(x))
	case []Value:
		var s strings.Builder
		s.WriteByte('[')
		for i, v := range x {
			s.WriteString(v.Repr())
			if i < len(x)-1 {
				s.WriteByte(',')
			}
		}
		s.WriteString("]:ARRAY")
		return s.String()
	case Missing:
		return ":MISSING"
	default:

    // 1 big endian int, the number of longs in our bitset
    // N big endian longs of our bitset
    DataOutputStream dout = new DataOutputStream(out);
    dout.writeByte(SignedBytes.checkedCast(strategy.ordinal()));
    dout.writeByte(UnsignedBytes.checkedCast(numHashFunctions)); // note: checked at the c'tor
    dout.writeInt(bits.data.length());
    for (int i = 0; i < bits.data.length(); i++) {