_perform_parameter_wrapping

# File actionpack/lib/action_controller/metal/params_wrapper.rb, line 299
      def _perform_parameter_wrapping
        wrapped_hash = _wrap_parameters request.request_parameters
        wrapped_keys = request.request_parameters.keys
        wrapped_filtered_hash = _wrap_parameters request.filtered_parameters.slice(*wrapped_keys)

        # This will make the wrapped hash accessible from controller and view.
        request.parameters.merge! wrapped_hash
        request.request_parameters.merge! wrapped_hash

        # This will display the wrapped hash in the log file.
        request.filtered_parameters.merge! wrapped_filtered_hash
      end