Example showing how to authenticate with multiple Asserting Parties

[OrangeDog]

Continuing from:
spring-projects/spring-security#10551
spring-attic/spring-security-saml#521 (comment)

One Relying Party (Service Provider) should be able to authenticate with a choice of Asserting Parties (Identity Providers).
That's the basic SAML Federation system.

If this is currently possible, please add an example showing how (discovery can be a choice of two buttons - one for each IdP).
If this is not currently possible, please re-open the feature request(s) for it.
If it is not possible to add this feature, please resume support for spring-security-saml, which does allow this.

[OrangeDog]

Does the silence mean I was correct, and the design of SAML support in Spring 5 is fatally flawed?

[OrangeDog]

@jzheaux?

[stnor]

Bump. I desperately need this too @jzheaux.