def continue
      fail 'This is the last page' unless continue?

      action = @action.merge(@metadata.fetch('continue'))

      self.class.new(action, merge_responses(JSON.parse(action.perform)))
    end
def continue
      fail 'This is the last page' unless continue?

      action = @action.merge(@metadata.fetch('continue'))

      self.class.new(action, merge_responses(JSON.parse(action.perform)))
    end
Continues current request and returns current & next pages merged. (Merging is necessary
 because MediaWiki tends to return the same object's data continued on the next request page.)

 @return [Response]