class_docstr: Network bytes sent.
code: def sample(self) -> None:
      self.samples.append(
          psutil.net_io_counters().bytes_sent - self.sent_init
      )
  
imports: import threading
  from collections import deque
  from typing import TYPE_CHECKING, List
  from .aggregators import aggregate_mean
  from .asset_registry import asset_registry
  from .interfaces import Interface, Metric, MetricsMonitor
label_desc: Use image node_id 2 for calling the NetworkSent obj's underlying member method code with example usage: obj.sample() without return types