def update
      if attempt_update
        after_update_response
      else
        after_update_failure_response
      end
    rescue RSolr::Error::Http => error
      flash[:error] = error.message
      logger.error "FileSetsController::update rescued #{error.class}\n\t#{error.message}\n #{error.backtrace.join("\n")}\n\n"
      render action: 'edit'
    end
def update
      if attempt_update
        after_update_response
      else
        after_update_failure_response
      end
    rescue RSolr::Error::Http => error
      flash[:error] = error.message
      logger.error "FileSetsController::update rescued #{error.class}\n\t#{error.message}\n #{error.backtrace.join("\n")}\n\n"
      render action: 'edit'
    end
PATCH /concern/file_sets/:id