def METHOD_NAME(self):
    identifier = "123"
    fallthrough_choice = FallthroughChoiceType.ALL_MEMBERS
    assert split_key(
        f"mail:p:{self.project.id}:{ActionTargetType.ISSUE_OWNERS.value}:{identifier}:{fallthrough_choice.value}"
    ) == (self.project, ActionTargetType.ISSUE_OWNERS, identifier, fallthrough_choice)