nitro.go
func (m *Nitro) NewWriter() *Writer {
	w := m.newWriter()
	w.next = m.wlist
	m.wlist = w
	w.dwrCtx.Init()

	m.shutdownWg1.Add(1)
	go m.collectionWorker(w)
	if m.useMemoryMgmt {
		m.shutdownWg2.Add(1)
		go m.freeWorker(w)
	}

	return w
}
func (m *Nitro) NewWriter() *Writer {
	w := m.newWriter()
	w.next = m.wlist
	m.wlist = w
	w.dwrCtx.Init()

	m.shutdownWg1.Add(1)
	go m.collectionWorker(w)
	if m.useMemoryMgmt {
		m.shutdownWg2.Add(1)
		go m.freeWorker(w)
	}

	return w
}
// NewWriter creates a Nitro writer