def process_casgn(exp, parent)
      if exp.defines_module?
        process_module(exp, parent)
      else
        process(exp)
      end
    end
def process_casgn(exp, parent)
      if exp.defines_module?
        process_module(exp, parent)
      else
        process(exp)
      end
    end
Handles `casgn` ("class assign") nodes.

 An input example that would trigger this method would be:

   Foo = Class.new Bar