WP_Post_Type::add_supports

	 * @since 4.6.0
	 */
	public function add_supports() {
		if ( ! empty( $this->supports ) ) {
			foreach ( $this->supports as $feature => $args ) {
				if ( is_array( $args ) ) {
					add_post_type_support( $this->name, $feature, $args );
				} else {
					add_post_type_support( $this->name, $args );
				}
			}
			unset( $this->supports );
		} elseif ( false !== $this->supports ) {
			// Add default features.
			add_post_type_support( $this->name, array( 'title', 'editor' ) );