Identifier Statement
Expect Id is a Hydra-specific expectation step similar to Expect Property
which generates checks that a resource has the given identifier.
Usage
PREFIX ex: <http://example.com/>
With Operation ex:CreateProject {
    Invoke {
        Content-Type "text/turtle"
        ```
        @prefix schema: <http://schema.org/>
        <> schema:name "Testing with Hypertest" .
        ```
    } => {
        Expect Id <http://my.blog/article/testing-with-hypertest>
    }
}
