def METHOD_NAME(self):
    assert versions.is_serverless("serverless")
    assert versions.is_serverless("default") is False
    assert versions.is_serverless(None) is False
    assert versions.is_serverless("") is False
    assert versions.is_serverless("     \t ") is False
    assert versions.is_serverless("8-ab-c") is False
    assert versions.is_serverless("8.9.0") is False
    assert versions.is_serverless("8.1") is False
    assert versions.is_serverless("8") is False
    assert versions.is_serverless("20.3.7-SNAPSHOT") is False