clj-http-lite drives java.net URL/HttpURLConnection and java.io byte streams
through .method interop. The Chez host had __register-class-ctor!/-statics! (what
router/reitit needs) but no way to register instance methods on a shim object or
to extend instance?. Add both, plus jolt.host/table?:
- tagged-table .method dispatch: an htable-arm on record-method-dispatch routes
(.m obj a*) through a per-tag method registry keyed off the table's jolt/type;
unregistered methods fall through (sorted colls are htables too).
- __register-instance-check! installs (fn [class-name val] -> true|false|nil),
nil = fall through; chained ahead of the base instance-check.
Runtime .ss shims, no re-mint. Unit covers dispatch, args, instance? both ways.
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