How do you show class argument hierarchy?

I want to pull up the Show Usage for a class argument (parameter) that is passed into a base class.  Is it possible to do this?

(in case I'm not describing this properly)

 Say I have the following classes

class Foo:
    def __init__(self, var):
        self.var = var

class Bar(Foo):
    def __init__(self, var):
        super(Bar, self).__init__(var)

If I put my cursor on var in Foo's __init__ and do a find usage I see this

Notice, it does not find the usage of var in Bar.

However, if I attempt to rename the var in Foo there is an option to rename the parameter in hierarchy.

Notice that it finds the usage in the hierarchy.

My question is: How can I do a 'Find Usage' in this same manner without trying to rename the parameter?