PHP is a little weird in so far that what you get from e.g. `(object)[]`
or json_decode() are not objects but stdClass instances. You can think
of stdClass as a subclass of object, i.e. it's more specific.
Using is_object() means that stuff like ArrayIterator will be accepted,
which is not correct in this context here.
Change-Id: I0bffc54508ac7a27bbb59c3aabb9695158eb96b3
The word "param" is not really that ambiguous in this context. The
only other meaning it could have is "parameter name". Such places
already use $paramName.
This makes the following patches easier to review.
Change-Id: I1e6210d1ca7d58726a0fc3b3396d75e0e28c16d8
No functional change was made to the code. It was only moved from one
place to another. Note there are a lot of tests that cover this code.
The tests haven't been touched on purpose. Splitting these as well
is something for a later patch.
Bug: T260980
Change-Id: I9fa0fa87768f2560b83a1b5f3d39211ea9d6cfad
