class_docstr: A DataProvider implementation for tfdbg v2 data on local filesystem.
  
  In this implementation, `experiment_id` is assumed to be the path to the
  logdir that contains the DebugEvent file set.
class_docstr_tok: ["A","DataProvider","implementation","for","tfdbg","v2","data","on","local","filesystem",".","In","this","implementation",",","`","experiment_id","`","is","assumed","to","be","the","path","to","the","logdir","that","contains","the","DebugEvent","file","set","."]
code: def _get_first_event_timestamp(self, run_name):
      try:
          return self._multiplexer.FirstEventTimestamp(run_name)
      except ValueError as e:
          return None
  
imports: import json
  from tensorboard.data import provider
  from tensorboard.plugins.debugger_v2 import debug_data_multiplexer
label_desc: Use image node_id 3 for calling the LocalDebuggerV2DataProvider obj's underlying member method code with example usage: obj._get_first_event_timestamp(run_name) and returns: self, None