getRandomCompliment () {
		// get the current time of day compliments list
		const compliments = this.complimentArray();
		// variable for index to next message to display
		let index;
		// are we randomizing
		if (this.config.random) {
			// yes
			index = this.randomIndex(compliments);
		} else {
			// no, sequential
			// if doing sequential, don't fall off the end
			index = this.lastIndexUsed >= compliments.length - 1 ? 0 : ++this.lastIndexUsed;
		}

		return compliments[index] || "";
	}
Retrieve a random compliment.
@returns {string} a compliment