docs: def SetCoreGRRKnowledgeBaseValues(kb, client_obj):
    """Set core values from GRR into the knowledgebase."""
    client_schema = client_obj.Schema
    kb.fqdn = utils.SmartUnicode(client_obj.Get(client_schema.FQDN, ""))
    if not kb.fqdn:
      kb.fqdn = utils.SmartUnicode(client_obj.Get(client_schema.HOSTNAME, ""))
    versions = client_obj.Get(client_schema.OS_VERSION)
    if versions and versions.versions:
      try:
        kb.os_major_version = versions.versions[0]
        kb.os_minor_version = versions.versions[1]
      except IndexError:
        # Some OSs don't have a minor version.
        pass
    client_os = client_obj.Get(client_schema.SYSTEM)
    if client_os:
      kb.os = utils.SmartUnicode(client_obj.Get(client_schema.SYSTEM))