public function widget( $args, $instance ) {
		if ( empty( $instance['cb_display'] ) || ! is_array( $instance['cb_display'] ) ) {
			return;
		}

		// before and after widget arguments are defined by themes.
		echo $args['before_widget'];

		$title = apply_filters( 'widget_title', $instance['title'] );
		if ( ! empty( $title ) ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}

		$format_slugs = array_keys( $this->formats() );
		$format       = in_array( $instance['format'], $format_slugs ) ? $instance['format'] : $format_slugs[0];

		printf(
			'<div class="invp-%s">%s',
			$format,
			$this->formats()[ $format ]['before']
		);

		// loop through each location.
		$location_info = get_terms(
			array(
				'taxonomy'   => 'location',
				'fields'     => 'id=>name',
				'hide_empty' => false,
			)
		);
		foreach ( $location_info as $term_id => $name ) {
			// Does this address even have a phone number displayed by this instance of this widget?
			if ( empty( $instance['cb_display'][ $term_id ] ) ) {
				// No.
				continue;
			}

			for ( $p = 1; $p <= INVP::LOCATION_MAX_PHONES; $p++ ) {
				$phone_uid = get_term_meta( $term_id, 'phone_' . $p . '_uid', true );
				if ( ! $phone_uid ) {
					break;
				}

				// There is a phone number is slot $p, has the user configured this widget to display it?
				if ( in_array( $phone_uid, $instance['cb_display'][ $term_id ], true ) ) {
					// Yes, output this number.
					$number = get_term_meta( $term_id, 'phone_' . $p . '_number', true );
					if ( $this->formats()[ $format ]['uses_labels'] ) {
						$description = get_term_meta( $term_id, 'phone_' . $p . '_description', true );
						printf( $this->formats()[ $format ]['repeater'], $description, INVP::prepare_phone_number_for_link( $number ), $number );
					} else {
						printf( $this->formats()[ $format ]['repeater'], INVP::prepare_phone_number_for_link( $number ), $number );
					}
				}
			}
		}

		echo $this->formats()[ $format ]['after']
		. '</div>'
		. $args['after_widget'];
	}