code: func (h *BytesRefHash) Reinit() {
  	if h.bytesStart == nil {
  		h.bytesStart = h.bytesStartArray.Init()
  	}
  	if h.ids == nil {
  		h.ids = make([]int, h.hashSize)
  		h.bytesUsed.AddAndGet(NUM_BYTES_INT * int64(h.hashSize))
  	}
  }
docs: /*
  reinitializes the BytesRefHash after a previous clear() call. If
  clear() has not been called previously this method has no effect.
  */