code: def one_run(run_id_prefix, *_):
      try:
          id, path = next(var.find_runs(run_id_prefix))
      except StopIteration:
          return None
      else:
          return runlib.Run(id, path)
  
imports: import logging
  import os
  import re
  import guild
  from guild import batch_util
  from guild import click_util
  from guild import config
  from guild import index
  from guild import run
  from guild import run_util
  from guild import util
  from guild import var
  from .None import compare_impl
  from .None import runs_impl
label_desc: Use image node_id 5 for calling the ViewDataImpl obj's underlying member method code with example usage: obj.one_run(run_id_prefix) and returns: runlib, None