* @throws IOException If the model could not be serialized.
     */
    void write(File output, Map<String, Object> options, Model model) throws IOException;

    /**
     * Writes the supplied model to the specified character writer. The writer will be automatically closed before the
     * method returns.
     *
     * @param output The writer to serialize the model to, must not be {@code null}.

  private val path = mutableListOf<String>()

  /**
   * False unless we made a recursive call to [write] at the current stack frame. The explicit box
   * adapter can clear this to synthesize non-constructed values that are embedded in octet strings.
   */
  var constructed = false

  fun write(
    name: String,
    tagClass: Int,
    tag: Long,
    block: (BufferedSink) -> Unit,
  ) {

    var b1 = length
    if (isClient) {
      b1 = b1 or B1_FLAG_MASK
      sinkBuffer.writeByte(b1)

      random.nextBytes(maskKey!!)
      sinkBuffer.write(maskKey)

      if (length > 0) {
        val payloadStart = sinkBuffer.size
        sinkBuffer.write(payload)

        sinkBuffer.readAndWriteUnsafe(maskCursor!!)
        maskCursor.seek(payloadStart)
        toggleMask(maskCursor, maskKey)

    StringBuilder builder = new StringBuilder();
    Writer writer = new AppendableWriter(builder);

    writer.write("Hello".toCharArray());
    writer.write(',');
    writer.write(0xBEEF0020); // only lower 16 bits are important
    writer.write("Wo");
    writer.write("Whirled".toCharArray(), 3, 2);
    writer.write("Mad! Mad, I say", 2, 2);

    assertEquals("Hello, World!", builder.toString());
  }

// EncodeMsg implements msgp.Encodable
func (z BatchJobKeyRotateEncryption) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 3
	// write "Type"
	err = en.Append(0x83, 0xa4, 0x54, 0x79, 0x70, 0x65)
	if err != nil {
		return
	}
	err = en.WriteString(string(z.Type))
	if err != nil {
		err = msgp.WrapError(err, "Type")
		return
	}
	// write "Key"
	err = en.Append(0xa3, 0x4b, 0x65, 0x79)
	if err != nil {
		return
	}

		return
	}
	// write "Path"
	err = en.Append(0xa4, 0x50, 0x61, 0x74, 0x68)
	if err != nil {
		return
	}
	err = en.WriteString(z.Path)
	if err != nil {
		err = msgp.WrapError(err, "Path")
		return
	}
	// write "Creds"
	err = en.Append(0xa5, 0x43, 0x72, 0x65, 0x64, 0x73)
	if err != nil {
		return
	}
	// map header, size 3
	// write "AccessKey"

    /**
     * Method write.
     *
     * @param writer a writer object.
     * @param model a model object.
     * @throws IOException java.io.IOException if any.
     */
    @Override
    public void write(Writer writer, Model model) throws IOException {
        super.write(writer, model);
    } // -- void write( Writer, Model )

    /**
     * Method write.
     *
     * @param stream a stream object.

    }

    /**
     * Method write.
     *
     * @param writer a writer object.
     * @param persistedToolchains a persistedToolchains object.
     * @throws IOException java.io.IOException if any.
     */
    public void write(Writer writer, PersistedToolchains persistedToolchains) throws IOException {
        try {
            delegate.write(writer, persistedToolchains.getDelegate());

	opts Options

	// f is the currently open file used for appends.
	// Writes to f are only synchronized once Close() is called,
	// or when files are being rotated.
	f *os.File

	pw *xioutil.PipeWriter
	pr *xioutil.PipeReader
}

// Write writes p into the current file, rotating if necessary.
// Write is non-blocking, if the writer's queue is not full.
// Write is blocking otherwise.

In OkHttp we expose a blocking API over a framed protocol. This document explains the code and policy that makes that work.

### Threads

#### Application's calling thread