mory >= $memory_limit;

		return apply_filters( 'action_scheduler_memory_exceeded', $memory_exceeded, $this );
	}

	/**
	 * See if the batch limits have been exceeded, which is when memory usage is almost at
	 * the maximum limit, or the time to process more actions will exceed the max time limit.
	 *
	 * Based on WC_Background_Process::batch_limits_exceeded()
	 *
	 * @param int $processed_actions The number of actions processed so far - used to determine the likelihood of exceeding the time limit if processing another action
	 * @return bool
	 */
	protected function batch_limits_exceeded( $processed_actions ) {
		return $this->memory_exceeded() || $this->time_likely_to_be_exceeded( $processed_actions );
	}

	/**
	 * Process actions in the queue.
	 *
	 * @author Jeremy Pry
	 * @param string $context Optional identifer for the context in which this action is being processed, e.g. 'WP CLI' or 'WP Cron'
	 *        Generally, this should be capitalised and not localised as it's a proper noun.
	 * @return int The number of actions processed.
	 */
	abstract public function run( $context = '' );
}