public function getLastDismissal() {
		$lastDismissal = 0;

		$prompts = $this->getPrompts();
		foreach ( $prompts as $prompt ) {
			$promptDismissal = 0;

			if ( ! empty( $prompt['time_dismissed'] ) ) {
				$promptDismissal = $prompt['time_dismissed'];
			} elseif ( ! empty( $prompt['time_snoozed'] ) ) {
				$promptDismissal = $prompt['time_snoozed'];
			}

			$lastDismissal = $promptDismissal > $lastDismissal ? $promptDismissal : $lastDismissal;
		}

		return $lastDismissal;
	}