Method accepting two different types as parameter

Question

I am writing a method that should accept as its parameter an object of one of two types which do not share a parent type other than Object. For example, the types are Dreams

Answer 1

How about this:

interface ICrushable {
    void crush();
}

utterlyDestroy(ICrushable parameter) {
    // Very long crushing process goes here
    parameter.crush()
}

utterlyDestroy(Dreams parameter) {
    utterlyDestroy(new ICrushable() { crush() {parameter.crush();});
}

utterlyDestroy(Garlic parameter) {
    utterlyDestroy(new ICrushable() { crush() {parameter.crush();});
}

New development should implement the ICrushable interface, but for the existing Classes, the parameter is wrapped in an ICrushable and passed to the utterlyDestroy(ICrushable) that does all the work.