_deep_transform_keys_in_object!

# File actionpack/lib/action_controller/metal/strong_parameters.rb, line 1064
      def _deep_transform_keys_in_object!(object, &block)
        case object
        when Hash
          object.keys.each do |key|
            value = object.delete(key)
            object[yield(key)] = _deep_transform_keys_in_object!(value, &block)
          end
          object
        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