docs: def GetUserInfo(knowledge_base, user):
    # TODO: This docstring cannot be a raw literal because there are
    # issues with raw unicode literals on Python 2. Once support for Python 2 is
    # dropped, it can be made raw again.
    # pylint: disable=g-docstring-has-escape
    """Get a User protobuf for a specific user.
  
    Args:
      knowledge_base: An rdf_client.KnowledgeBase object.
      user: Username as string. May contain domain like DOMAIN\\user.
  
    Returns:
      A User rdfvalue or None
    """
    # pylint: enable=g-docstring-has-escape
    if "\\" in user:
      domain, user = user.split("\\", 1)
      users = [
          u for u in knowledge_base.users
          if u.username == user and u.userdomain == domain
      ]
    else:
      users = [u for u in knowledge_base.users if u.username == user]
  
    if not users:
      return
    else:
      return users[0]