Find the HTTP Location of handler with ID. If the
setting/2) http:prefix is active, Location
is the handler location prefixed with the prefix setting. Handler IDs
can be specified in two ways:
If this appears in the option list of the handler, this it is used and
takes preference over using the predicate.
The module-qualified name of the predicate.
The unqualified name of the predicate.
The predicate http_link_to_id/3
provides the same functionality with the option to add query parameters
or a path parameter.
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