Locate all the nested properties of a certain class

I have a "huge" object with lots of nested properties, and I would like to locate all the instances of a certain class within the properties.

For example, in pseudocode, I am looking for something like the function findClassWithinObject below:

hugeobject = HugeObject()
targetclass = 'TargetClass'
findClassWithinObject(hugeobject, targetclass)
% Returns: {hugeobject.level1property1.level1property2, hugeobject.level1property100}
% Which are properties whose class is TargetClass

If returning "all" the properties is too much, finding a single instance of the TargetClass would already help me navigate the codebase.

Thanks