How to use the rsocket-core.BufferEncoder.encode function in rsocket-core

offset = buffer.writeUInt16BE(serviceLength, offset);
  offset = UTF8Encoder.encode(service, buffer, offset, offset + serviceLength);

  offset = buffer.writeUInt16BE(methodLength, offset);
  offset = UTF8Encoder.encode(method, buffer, offset, offset + methodLength);

  offset = buffer.writeUInt16BE(tracingLength, offset);
  offset = BufferEncoder.encode(
    tracing,
    buffer,
    offset,
    offset + tracingLength,
  );

  BufferEncoder.encode(metadata, buffer, offset, offset + metadataLength);

  return buffer;
}

methodLength +
      TRACING_LENGTH_SIZE +
      tracingLength +
      metadataLength,
  );

  let offset = buffer.writeUInt16BE(VERSION, 0);

  offset = buffer.writeUInt16BE(serviceLength, offset);
  offset = UTF8Encoder.encode(service, buffer, offset, offset + serviceLength);

  offset = buffer.writeUInt16BE(methodLength, offset);
  offset = UTF8Encoder.encode(method, buffer, offset, offset + methodLength);

  offset = buffer.writeUInt16BE(tracingLength, offset);
  offset = BufferEncoder.encode(
    tracing,
    buffer,
    offset,
    offset + tracingLength,
  );

  BufferEncoder.encode(metadata, buffer, offset, offset + metadataLength);

  return buffer;
}

aggregatedTags.entries.forEach(entry => {
    resultBuf.writeUInt16BE(entry.keyLen, offset);
    offset += 2; //2 bytes for key length

    BufferEncoder.encode(
      entry.keyBuf,
      resultBuf,
      offset,
      offset + entry.keyLen,
    );
    offset += entry.keyLen;

    resultBuf.writeUInt16BE(entry.valLen, offset);
    offset += 2;

    BufferEncoder.encode(
      entry.valBuf,
      resultBuf,
      offset,
      offset + entry.valLen,
    );
    offset += entry.valLen;
  });

aggregatedTags.entries.forEach(entry => {
    resultBuf.writeUInt16BE(entry.keyLen, offset);
    offset += 2; //2 bytes for key length

    BufferEncoder.encode(
      entry.keyBuf,
      resultBuf,
      offset,
      offset + entry.keyLen,
    );
    offset += entry.keyLen;

    resultBuf.writeUInt16BE(entry.valLen, offset);
    offset += 2;

    BufferEncoder.encode(
      entry.valBuf,
      resultBuf,
      offset,
      offset + entry.valLen,
    );