restore_original_method (Mocha::AnyInstanceMethod)

        # File lib/mocha/any_instance_method.rb, line 39
    39:     def restore_original_method
    40:       if method_exists?(hidden_method)
    41:         begin
    42:           stubbee.send(:alias_method, method, hidden_method)
    43:           stubbee.send(:remove_method, hidden_method)
    44:         rescue NameError
    45:           # deal with nasties like ActiveRecord::Associations::AssociationProxy
    46:         end
    47:       end
    48:     end