questions re the ChainingMetadataProvider type

[Rod Widdowson]

> I'm pretty certain that I was accurate in saying we don't formally specify any sort order without the key even within a single
file and an
> explicit Chaining provider. We obviously have a predictable order, but it's implementation dependent.

No, we (I) explicitly added the documentation when I added the index:

[1] Metadata sources combined via a chain are searched in the order in which they occur in the chain, and the first entry matching
the entityID is returned.

I did so with an explicit knowledge of what I was doing so and with a not to watch this in future (Lists turning back into
Collections - which reminds me there is work to there still in V4 in the IdPAttribute#Getvalues()API...)

Pretty sure we discussed it too...



[1]
https://wiki.shibboleth.net/confluence/pages/viewpage.action?spaceKey=IDP30&title=MetadataConfiguration#MetadataConfiguration-Search
OrderingSearchOrdering