code: def maybe_log_tensorboard(
      self, stats, prefix, learning_rate, patience, step
  ):
      if self.tensorboard_writer is not None:
          stats.log_tensorboard(
              prefix,
              self.tensorboard_writer,
              learning_rate,
              patience,
              step,
          )
  
imports: import time
  from datetime import datetime
  import onmt
  from onmt.utils.logging import logger
label_desc: Use image node_id 2 for calling the ReportMgr obj's underlying member method code with example usage: obj.maybe_log_tensorboard(stats, prefix, learning_rate, patience, step) without return types