_deep_transform_keys_in_object

# File actionpack/lib/action_controller/metal/strong_parameters.rb, line 1045
      def _deep_transform_keys_in_object(object, &block)
        case object
        when Hash
          object.each_with_object(self.class.new) do |(key, value), result|
            result[yield(key)] = _deep_transform_keys_in_object(value, &block)
          end
        when Parameters
          if object.permitted?
            object.to_h.deep_transform_keys(&block)
          else
            object.to_unsafe_h.deep_transform_keys(&block)
          end
        when Array
          object.map { |e| _deep_transform_keys_in_object(e, &block) }
        else
          object
        end
      end