RFC: Sugar for has, instanceof

I would actually love some kind of function that tells me the instance name of an object, eg fooType = whatami(foo); we can do some more introspection of things during testing and debugging.

Sure, null is weird in that respect because it is nothing and nothing can never be instanceof anything, not even null itself. But that would still allow us to do things with things we know are valid objects, eg

    function foo(str as String) {
      t.isa(str, Lang.String, "We have a string so we cannot fail");
    }

    (:test)
    function testFooFunction(logger) {
      foo("String"); # test passes
      foo(1);        # doesn't even reach the test
                     # ERROR: fenix6xpro: /home/ciq/src/source/t/typechecking.mc:44:
                     # Invalid '$.Toybox.Lang.Number' passed as parameter 1 of type 
                     # '$.Toybox.Lang.String'.  
      return true;
    }
    
    

See the comments I received here: forums.garmin.com/.../improvement-request-make-null-has-foo-return-false-instead-of-null-reference-error