hydra:supportedOperation and hydra:IriTemplate

Hello list,

I am trying to build an hydra-core enabled API that handles IriTemplates.
I apologize in advance if the following is out of your normal topic scope
or is too specific.  I should preface that I have modified the hydra-core
javascript implementation to work for my use case.

I have a few questions regarding norms for defining supportedOperation
method and expected for an TemplatedLink property in the apiDocumentation.

I have constructed the following procedure:
1) loadDocument
2) find declared TemplatedLink property supported operation in document
properties.
3) find TemplatedLink property class with the api
4) define the templated link from the TemplatedLink class template property
4) parse the template link with expected variable(s).  (I am using
uri-templates to do this).
5) invoke supported operation method and pass parsed templated link as
content.
6) have httpClient.rawInvoke check if expected is IriTemplate class, and if
so, set url = content.

Step #6 is where my questions arise.  Is there a convention for an expected
template type check or supportedOperation method for template requests by
httpClient?  Should IriTemplate be declared as a hydra:Class or something
else in the apiDocumentation?  (It seems that only hydra:Class classes can
be declared as "expected".)  Also, since I did not want to use a domain
specific IriTemplate class check in the core client, I have reinstantiated
the core class in my api, which is probably not correct.

For reference, here is part of the apiDocumentation for the above:
    "supportedClass": [
        {
            "@id": "http://service.b-ol.de/api/hydra.json#EntryPoint",
           {...}
            "supportedProperty": [
                {
                    "property": {
                        "@id": "http://iiif.io/api/presentation/2#Manifest",
                        "@type": "TemplatedLink",
                        "http://www.w3.org/2000/01/rdf-schema#label": "IIIF
Manifest",
                        "domain": "
http://service.b-ol.de/api/hydra.json#EntryPoint",
                        "range": "Resource",
                        "supportedOperation": [
                            {
                                "@id": "
http://iiif.io/api/presentation/2#Manifest/GET",
                                "@type": "Operation",
                                "expects": "
http://www.w3.org/ns/hydra/core#IriTemplate",
                                "method": "GET",
                                "http://www.w3.org/2000/01/rdf-schema#label":
"Retrieves a Manifest Resource",
                                "returns": "
http://www.w3.org/ns/hydra/core#Resource"
                            }
                        ]
                    }
                }
           ]
        },
        {
            "@id": "http://iiif.io/api/presentation/2#Manifest",
            "@type": "Class",
            "template": "
http://service.b-ol.de/api/graphs/manifest.nt?node={node}",
            "http://www.w3.org/2000/01/rdf-schema#comment": "A IIIF
Manifest",
            "http://www.w3.org/2000/01/rdf-schema#label": "Manifest",
            "supportedOperation": {
                "@id": "http://service.b-ol.de/api/hydra.json#EntryPoint/GET
",
                "@type": "Operation",
                "http://www.w3.org/2000/01/rdf-schema#label": "The APIs
main entry point.",
                "method": "GET",
                "returns": {
                    "@id": "http://iiif.io/api/presentation/2#Manifest"
                },
                "statusCodes": []
            }
        },
        {
            "@id": "http://www.w3.org/ns/hydra/core#IriTemplate",
            "@type": "Class",
            "template": "
http://service.b-ol.de/api/hydra.json#EntryPoint/graphs/{query}?node={node}
",
            "variableRepresentation": "BasicRepresentation",
            "mapping": [
                {
                    "@type": "IriTemplateMapping",
                    "variable": "query",
                    "required": false
                },
                {
                    "@type": "IriTemplateMapping",
                    "variable": "node",
                    "required": true
                }
            ]
        }
]

Thanks for your assistance,
Christopher Johnson