tools/make_cpptoc_impl.py [135:161]:
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                '\n    return'+retval_default+';'

    # check index params
    index_params = arg.parent.get_attrib_list('index_param')
    if not index_params is None and arg_name in index_params:
      result += comment+\
                '\n  DCHECK_GE('+arg_name+', 0);'\
                '\n  if ('+arg_name+' < 0)'\
                '\n    return'+retval_default+';'

  if len(optional) > 0:
    # Wrap the comment at 80 characters.
    str = '\n  // Unverified params: ' + optional[0]
    for name in optional[1:]:
      str += ','
      if len(str) + len(name) + 1 > 80:
        result += str
        str = '\n  //'
      str += ' ' + name
    result += str

  if len(result) != result_len:
    result += '\n'
  result_len = len(result)

  # parameter translation
  params = []
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tools/make_ctocpp_impl.py [151:177]:
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                '\n    return'+retval_default+';'

    # check index params
    index_params = arg.parent.get_attrib_list('index_param')
    if not index_params is None and arg_name in index_params:
      result += comment+\
                '\n  DCHECK_GE('+arg_name+', 0);'\
                '\n  if ('+arg_name+' < 0)'\
                '\n    return'+retval_default+';'

  if len(optional) > 0:
    # Wrap the comment at 80 characters.
    str = '\n  // Unverified params: ' + optional[0]
    for name in optional[1:]:
      str += ','
      if len(str) + len(name) + 1 > 80:
        result += str
        str = '\n  //'
      str += ' ' + name
    result += str

  if len(result) != result_len:
    result += '\n'
  result_len = len(result)

  # parameter translation
  params = []
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