def METHOD_NAME():
    signature_type = "ccla"
    signature_return_url = "https://github.com/communitybridge/easycla/pull/227"
    signature_sign_url = "https://demo.docusign.net/Signing/MTRedeem/v1/4b594c99-d76b-46c4-bf8c-5912b177b0eb?slt=eyJ0eXAiOi"
    signature = Signature(
        signature_type=signature_type,
        signature_return_url=signature_return_url,
        signature_sign_url=signature_sign_url
    )
    result = canceled_signature_html(signature=signature)
    assert "Ccla" in result
    assert signature_return_url in result
    assert signature_sign_url in result
    signature = Signature(
        signature_sign_url=signature_sign_url
    )
    result = canceled_signature_html(signature=signature)
    assert "Ccla" not in result
    assert signature_return_url not in result
    assert signature_sign_url in result